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Finding the Fourth Proportional to 8,721.64, 12,035.94 and 8,060.20

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Solution

The fourth proportional to 8,721.64, 12,035.94 and 8,060.20 is: 11,123.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.64 : 12,035.94 = 8,060.20 : x
  2. Step 2: Convert to fraction form
    8,721.64/12,035.94 = 8,060.20/x
  3. Step 3: Cross multiply
    8,721.64x = 12,035.94 × 8,060.20
  4. Step 4: Simplify right side
    8,721.64x = 97,012,083.59
  5. Step 5: Solve for x
    x = 97,012,083.59/8,721.64
  6. Step 6: Final answer
    x = 11,123.15

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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.