Home / 21,126.61-29,151.66-13,573.59

Finding the Fourth Proportional to 21,126.61, 29,151.66 and 13,573.59

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Solution

The fourth proportional to 21,126.61, 29,151.66 and 13,573.59 is: 18,729.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.61 : 29,151.66 = 13,573.59 : x
  2. Step 2: Convert to fraction form
    21,126.61/29,151.66 = 13,573.59/x
  3. Step 3: Cross multiply
    21,126.61x = 29,151.66 × 13,573.59
  4. Step 4: Simplify right side
    21,126.61x = 395,692,680.66
  5. Step 5: Solve for x
    x = 395,692,680.66/21,126.61
  6. Step 6: Final answer
    x = 18,729.59

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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.