Home / 20,715.70-31,073.55-18,577.30

Finding the Fourth Proportional to 20,715.70, 31,073.55 and 18,577.30

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Solution

The fourth proportional to 20,715.70, 31,073.55 and 18,577.30 is: 27,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.70 : 31,073.55 = 18,577.30 : x
  2. Step 2: Convert to fraction form
    20,715.70/31,073.55 = 18,577.30/x
  3. Step 3: Cross multiply
    20,715.70x = 31,073.55 × 18,577.30
  4. Step 4: Simplify right side
    20,715.70x = 577,262,660.42
  5. Step 5: Solve for x
    x = 577,262,660.42/20,715.70
  6. Step 6: Final answer
    x = 27,865.95

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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.