Home / 21,507.32-29,679.15-11,947.85

Finding the Fourth Proportional to 21,507.32, 29,679.15 and 11,947.85

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Solution

The fourth proportional to 21,507.32, 29,679.15 and 11,947.85 is: 16,487.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.32 : 29,679.15 = 11,947.85 : x
  2. Step 2: Convert to fraction form
    21,507.32/29,679.15 = 11,947.85/x
  3. Step 3: Cross multiply
    21,507.32x = 29,679.15 × 11,947.85
  4. Step 4: Simplify right side
    21,507.32x = 354,602,122.97
  5. Step 5: Solve for x
    x = 354,602,122.97/21,507.32
  6. Step 6: Final answer
    x = 16,487.51

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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.