Home / 21,531.32-29,721.35-12,581.74

Finding the Fourth Proportional to 21,531.32, 29,721.35 and 12,581.74

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Solution

The fourth proportional to 21,531.32, 29,721.35 and 12,581.74 is: 17,367.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.32 : 29,721.35 = 12,581.74 : x
  2. Step 2: Convert to fraction form
    21,531.32/29,721.35 = 12,581.74/x
  3. Step 3: Cross multiply
    21,531.32x = 29,721.35 × 12,581.74
  4. Step 4: Simplify right side
    21,531.32x = 373,946,128.80
  5. Step 5: Solve for x
    x = 373,946,128.80/21,531.32
  6. Step 6: Final answer
    x = 17,367.54

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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.