Home / 21,370.32-29,489.40-12,872.88

Finding the Fourth Proportional to 21,370.32, 29,489.40 and 12,872.88

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Solution

The fourth proportional to 21,370.32, 29,489.40 and 12,872.88 is: 17,763.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.32 : 29,489.40 = 12,872.88 : x
  2. Step 2: Convert to fraction form
    21,370.32/29,489.40 = 12,872.88/x
  3. Step 3: Cross multiply
    21,370.32x = 29,489.40 × 12,872.88
  4. Step 4: Simplify right side
    21,370.32x = 379,613,507.47
  5. Step 5: Solve for x
    x = 379,613,507.47/21,370.32
  6. Step 6: Final answer
    x = 17,763.59

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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.