Home / 21,645.09-29,865.15-13,146.98

Finding the Fourth Proportional to 21,645.09, 29,865.15 and 13,146.98

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Solution

The fourth proportional to 21,645.09, 29,865.15 and 13,146.98 is: 18,139.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.09 : 29,865.15 = 13,146.98 : x
  2. Step 2: Convert to fraction form
    21,645.09/29,865.15 = 13,146.98/x
  3. Step 3: Cross multiply
    21,645.09x = 29,865.15 × 13,146.98
  4. Step 4: Simplify right side
    21,645.09x = 392,636,380.42
  5. Step 5: Solve for x
    x = 392,636,380.42/21,645.09
  6. Step 6: Final answer
    x = 18,139.74

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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.