Home / 21,507.26-29,679.85-12,432.42

Finding the Fourth Proportional to 21,507.26, 29,679.85 and 12,432.42

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Solution

The fourth proportional to 21,507.26, 29,679.85 and 12,432.42 is: 17,156.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.26 : 29,679.85 = 12,432.42 : x
  2. Step 2: Convert to fraction form
    21,507.26/29,679.85 = 12,432.42/x
  3. Step 3: Cross multiply
    21,507.26x = 29,679.85 × 12,432.42
  4. Step 4: Simplify right side
    21,507.26x = 368,992,376.28
  5. Step 5: Solve for x
    x = 368,992,376.28/21,507.26
  6. Step 6: Final answer
    x = 17,156.65

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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.