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Finding the Fourth Proportional to 8,489.70, 12,666.42 and 7,554.15

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Solution

The fourth proportional to 8,489.70, 12,666.42 and 7,554.15 is: 11,270.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.70 : 12,666.42 = 7,554.15 : x
  2. Step 2: Convert to fraction form
    8,489.70/12,666.42 = 7,554.15/x
  3. Step 3: Cross multiply
    8,489.70x = 12,666.42 × 7,554.15
  4. Step 4: Simplify right side
    8,489.70x = 95,684,036.64
  5. Step 5: Solve for x
    x = 95,684,036.64/8,489.70
  6. Step 6: Final answer
    x = 11,270.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.