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Finding the Fourth Proportional to 8,700.88, 12,007.18 and 4,721.96

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Solution

The fourth proportional to 8,700.88, 12,007.18 and 4,721.96 is: 6,516.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.88 : 12,007.18 = 4,721.96 : x
  2. Step 2: Convert to fraction form
    8,700.88/12,007.18 = 4,721.96/x
  3. Step 3: Cross multiply
    8,700.88x = 12,007.18 × 4,721.96
  4. Step 4: Simplify right side
    8,700.88x = 56,697,423.67
  5. Step 5: Solve for x
    x = 56,697,423.67/8,700.88
  6. Step 6: Final answer
    x = 6,516.29

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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.