Home / 21,126.24-29,127.72-13,559.20

Finding the Fourth Proportional to 21,126.24, 29,127.72 and 13,559.20

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Solution

The fourth proportional to 21,126.24, 29,127.72 and 13,559.20 is: 18,694.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.24 : 29,127.72 = 13,559.20 : x
  2. Step 2: Convert to fraction form
    21,126.24/29,127.72 = 13,559.20/x
  3. Step 3: Cross multiply
    21,126.24x = 29,127.72 × 13,559.20
  4. Step 4: Simplify right side
    21,126.24x = 394,948,581.02
  5. Step 5: Solve for x
    x = 394,948,581.02/21,126.24
  6. Step 6: Final answer
    x = 18,694.69

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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.