Home / 21,115.32-31,628.25-13,697.70

Finding the Fourth Proportional to 21,115.32, 31,628.25 and 13,697.70

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Solution

The fourth proportional to 21,115.32, 31,628.25 and 13,697.70 is: 20,517.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.32 : 31,628.25 = 13,697.70 : x
  2. Step 2: Convert to fraction form
    21,115.32/31,628.25 = 13,697.70/x
  3. Step 3: Cross multiply
    21,115.32x = 31,628.25 × 13,697.70
  4. Step 4: Simplify right side
    21,115.32x = 433,234,280.03
  5. Step 5: Solve for x
    x = 433,234,280.03/21,115.32
  6. Step 6: Final answer
    x = 20,517.53

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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.