Home / 28,221.17-38,945.25-15,645.92

Finding the Fourth Proportional to 28,221.17, 38,945.25 and 15,645.92

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Solution

The fourth proportional to 28,221.17, 38,945.25 and 15,645.92 is: 21,591.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.17 : 38,945.25 = 15,645.92 : x
  2. Step 2: Convert to fraction form
    28,221.17/38,945.25 = 15,645.92/x
  3. Step 3: Cross multiply
    28,221.17x = 38,945.25 × 15,645.92
  4. Step 4: Simplify right side
    28,221.17x = 609,334,071.15
  5. Step 5: Solve for x
    x = 609,334,071.15/28,221.17
  6. Step 6: Final answer
    x = 21,591.39

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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.