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Finding the Fourth Proportional to 8,700.72, 12,006.88 and 4,721.97

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Solution

The fourth proportional to 8,700.72, 12,006.88 and 4,721.97 is: 6,516.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.72 : 12,006.88 = 4,721.97 : x
  2. Step 2: Convert to fraction form
    8,700.72/12,006.88 = 4,721.97/x
  3. Step 3: Cross multiply
    8,700.72x = 12,006.88 × 4,721.97
  4. Step 4: Simplify right side
    8,700.72x = 56,696,160.37
  5. Step 5: Solve for x
    x = 56,696,160.37/8,700.72
  6. Step 6: Final answer
    x = 6,516.26

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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.