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Finding the Fourth Proportional to 8,782.71, 12,114.59 and 6,129.15

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Solution

The fourth proportional to 8,782.71, 12,114.59 and 6,129.15 is: 8,454.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.71 : 12,114.59 = 6,129.15 : x
  2. Step 2: Convert to fraction form
    8,782.71/12,114.59 = 6,129.15/x
  3. Step 3: Cross multiply
    8,782.71x = 12,114.59 × 6,129.15
  4. Step 4: Simplify right side
    8,782.71x = 74,252,139.30
  5. Step 5: Solve for x
    x = 74,252,139.30/8,782.71
  6. Step 6: Final answer
    x = 8,454.35

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Double scale
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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.