Home / 20,644.95-28,501.85-13,591.88

Finding the Fourth Proportional to 20,644.95, 28,501.85 and 13,591.88

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Solution

The fourth proportional to 20,644.95, 28,501.85 and 13,591.88 is: 18,764.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.95 : 28,501.85 = 13,591.88 : x
  2. Step 2: Convert to fraction form
    20,644.95/28,501.85 = 13,591.88/x
  3. Step 3: Cross multiply
    20,644.95x = 28,501.85 × 13,591.88
  4. Step 4: Simplify right side
    20,644.95x = 387,393,616.45
  5. Step 5: Solve for x
    x = 387,393,616.45/20,644.95
  6. Step 6: Final answer
    x = 18,764.57

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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.