Home / 21,865.99-30,142.79-15,472.73

Finding the Fourth Proportional to 21,865.99, 30,142.79 and 15,472.73

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Solution

The fourth proportional to 21,865.99, 30,142.79 and 15,472.73 is: 21,329.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.99 : 30,142.79 = 15,472.73 : x
  2. Step 2: Convert to fraction form
    21,865.99/30,142.79 = 15,472.73/x
  3. Step 3: Cross multiply
    21,865.99x = 30,142.79 × 15,472.73
  4. Step 4: Simplify right side
    21,865.99x = 466,391,251.12
  5. Step 5: Solve for x
    x = 466,391,251.12/21,865.99
  6. Step 6: Final answer
    x = 21,329.53

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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.