Home / 20,839.38-31,259.08-9,152.70

Finding the Fourth Proportional to 20,839.38, 31,259.08 and 9,152.70

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Solution

The fourth proportional to 20,839.38, 31,259.08 and 9,152.70 is: 13,729.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.38 : 31,259.08 = 9,152.70 : x
  2. Step 2: Convert to fraction form
    20,839.38/31,259.08 = 9,152.70/x
  3. Step 3: Cross multiply
    20,839.38x = 31,259.08 × 9,152.70
  4. Step 4: Simplify right side
    20,839.38x = 286,104,981.52
  5. Step 5: Solve for x
    x = 286,104,981.52/20,839.38
  6. Step 6: Final answer
    x = 13,729.05

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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.