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Finding the Fourth Proportional to 8,700.76, 12,007.04 and 4,974.76

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Solution

The fourth proportional to 8,700.76, 12,007.04 and 4,974.76 is: 6,865.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.76 : 12,007.04 = 4,974.76 : x
  2. Step 2: Convert to fraction form
    8,700.76/12,007.04 = 4,974.76/x
  3. Step 3: Cross multiply
    8,700.76x = 12,007.04 × 4,974.76
  4. Step 4: Simplify right side
    8,700.76x = 59,732,142.31
  5. Step 5: Solve for x
    x = 59,732,142.31/8,700.76
  6. Step 6: Final answer
    x = 6,865.16

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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.