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Finding the Fourth Proportional to 7,929,398.80, 11,894,098.20 and 7,519,992.40

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Solution

The fourth proportional to 7,929,398.80, 11,894,098.20 and 7,519,992.40 is: 11,279,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929,398.80 : 11,894,098.20 = 7,519,992.40 : x
  2. Step 2: Convert to fraction form
    7,929,398.80/11,894,098.20 = 7,519,992.40/x
  3. Step 3: Cross multiply
    7,929,398.80x = 11,894,098.20 × 7,519,992.40
  4. Step 4: Simplify right side
    7,929,398.80x = 89,443,528,068,853.67
  5. Step 5: Solve for x
    x = 89,443,528,068,853.67/7,929,398.80
  6. Step 6: Final answer
    x = 11,279,988.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.