Home / 21,327.98-31,945.79-13,909.93

Finding the Fourth Proportional to 21,327.98, 31,945.79 and 13,909.93

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Solution

The fourth proportional to 21,327.98, 31,945.79 and 13,909.93 is: 20,834.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.98 : 31,945.79 = 13,909.93 : x
  2. Step 2: Convert to fraction form
    21,327.98/31,945.79 = 13,909.93/x
  3. Step 3: Cross multiply
    21,327.98x = 31,945.79 × 13,909.93
  4. Step 4: Simplify right side
    21,327.98x = 444,363,657.61
  5. Step 5: Solve for x
    x = 444,363,657.61/21,327.98
  6. Step 6: Final answer
    x = 20,834.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.