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Finding the Fourth Proportional to 8,700.75, 12,007.05 and 4,974.75

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Solution

The fourth proportional to 8,700.75, 12,007.05 and 4,974.75 is: 6,865.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.75 : 12,007.05 = 4,974.75 : x
  2. Step 2: Convert to fraction form
    8,700.75/12,007.05 = 4,974.75/x
  3. Step 3: Cross multiply
    8,700.75x = 12,007.05 × 4,974.75
  4. Step 4: Simplify right side
    8,700.75x = 59,732,071.99
  5. Step 5: Solve for x
    x = 59,732,071.99/8,700.75
  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.