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Finding the Fourth Proportional to 20,374.61, 28,117.04 and 11,882.61

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Solution

The fourth proportional to 20,374.61, 28,117.04 and 11,882.61 is: 16,398.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.61 : 28,117.04 = 11,882.61 : x
  2. Step 2: Convert to fraction form
    20,374.61/28,117.04 = 11,882.61/x
  3. Step 3: Cross multiply
    20,374.61x = 28,117.04 × 11,882.61
  4. Step 4: Simplify right side
    20,374.61x = 334,103,761.26
  5. Step 5: Solve for x
    x = 334,103,761.26/20,374.61
  6. Step 6: Final answer
    x = 16,398.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.