Home / 8,077.40-12,116.10-5,118.20

Finding the Fourth Proportional to 8,077.40, 12,116.10 and 5,118.20

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Solution

The fourth proportional to 8,077.40, 12,116.10 and 5,118.20 is: 7,677.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,077.40 : 12,116.10 = 5,118.20 : x
  2. Step 2: Convert to fraction form
    8,077.40/12,116.10 = 5,118.20/x
  3. Step 3: Cross multiply
    8,077.40x = 12,116.10 × 5,118.20
  4. Step 4: Simplify right side
    8,077.40x = 62,012,623.02
  5. Step 5: Solve for x
    x = 62,012,623.02/8,077.40
  6. Step 6: Final answer
    x = 7,677.30

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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.