Home / 20,868.05-31,234.34-15,320.16

Finding the Fourth Proportional to 20,868.05, 31,234.34 and 15,320.16

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Solution

The fourth proportional to 20,868.05, 31,234.34 and 15,320.16 is: 22,930.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.05 : 31,234.34 = 15,320.16 : x
  2. Step 2: Convert to fraction form
    20,868.05/31,234.34 = 15,320.16/x
  3. Step 3: Cross multiply
    20,868.05x = 31,234.34 × 15,320.16
  4. Step 4: Simplify right side
    20,868.05x = 478,515,124.59
  5. Step 5: Solve for x
    x = 478,515,124.59/20,868.05
  6. Step 6: Final answer
    x = 22,930.51

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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.