Home / 11,687.38-16,128.56-6,909.04

Finding the Fourth Proportional to 11,687.38, 16,128.56 and 6,909.04

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Solution

The fourth proportional to 11,687.38, 16,128.56 and 6,909.04 is: 9,534.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.38 : 16,128.56 = 6,909.04 : x
  2. Step 2: Convert to fraction form
    11,687.38/16,128.56 = 6,909.04/x
  3. Step 3: Cross multiply
    11,687.38x = 16,128.56 × 6,909.04
  4. Step 4: Simplify right side
    11,687.38x = 111,432,916.57
  5. Step 5: Solve for x
    x = 111,432,916.57/11,687.38
  6. Step 6: Final answer
    x = 9,534.47

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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.