Home / 21,655.26-29,870.78-13,149.11

Finding the Fourth Proportional to 21,655.26, 29,870.78 and 13,149.11

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Solution

The fourth proportional to 21,655.26, 29,870.78 and 13,149.11 is: 18,137.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.26 : 29,870.78 = 13,149.11 : x
  2. Step 2: Convert to fraction form
    21,655.26/29,870.78 = 13,149.11/x
  3. Step 3: Cross multiply
    21,655.26x = 29,870.78 × 13,149.11
  4. Step 4: Simplify right side
    21,655.26x = 392,773,956.91
  5. Step 5: Solve for x
    x = 392,773,956.91/21,655.26
  6. Step 6: Final answer
    x = 18,137.58

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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.