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Finding the Fourth Proportional to 8,700.66, 12,006.90 and 5,164.20

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Solution

The fourth proportional to 8,700.66, 12,006.90 and 5,164.20 is: 7,126.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.66 : 12,006.90 = 5,164.20 : x
  2. Step 2: Convert to fraction form
    8,700.66/12,006.90 = 5,164.20/x
  3. Step 3: Cross multiply
    8,700.66x = 12,006.90 × 5,164.20
  4. Step 4: Simplify right side
    8,700.66x = 62,006,032.98
  5. Step 5: Solve for x
    x = 62,006,032.98/8,700.66
  6. Step 6: Final answer
    x = 7,126.59

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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.