Home / 21,642.57-29,858.95-13,148.20

Finding the Fourth Proportional to 21,642.57, 29,858.95 and 13,148.20

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Solution

The fourth proportional to 21,642.57, 29,858.95 and 13,148.20 is: 18,139.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,642.57 : 29,858.95 = 13,148.20 : x
  2. Step 2: Convert to fraction form
    21,642.57/29,858.95 = 13,148.20/x
  3. Step 3: Cross multiply
    21,642.57x = 29,858.95 × 13,148.20
  4. Step 4: Simplify right side
    21,642.57x = 392,591,446.39
  5. Step 5: Solve for x
    x = 392,591,446.39/21,642.57
  6. Step 6: Final answer
    x = 18,139.78

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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.