Home / 21,123.30-29,150.09-11,432.75

Finding the Fourth Proportional to 21,123.30, 29,150.09 and 11,432.75

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Solution

The fourth proportional to 21,123.30, 29,150.09 and 11,432.75 is: 15,777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.30 : 29,150.09 = 11,432.75 : x
  2. Step 2: Convert to fraction form
    21,123.30/29,150.09 = 11,432.75/x
  3. Step 3: Cross multiply
    21,123.30x = 29,150.09 × 11,432.75
  4. Step 4: Simplify right side
    21,123.30x = 333,265,488.53
  5. Step 5: Solve for x
    x = 333,265,488.53/21,123.30
  6. Step 6: Final answer
    x = 15,777.15

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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.