Home / 20,940.24-28,923.18-15,658.56

Finding the Fourth Proportional to 20,940.24, 28,923.18 and 15,658.56

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Solution

The fourth proportional to 20,940.24, 28,923.18 and 15,658.56 is: 21,627.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.24 : 28,923.18 = 15,658.56 : x
  2. Step 2: Convert to fraction form
    20,940.24/28,923.18 = 15,658.56/x
  3. Step 3: Cross multiply
    20,940.24x = 28,923.18 × 15,658.56
  4. Step 4: Simplify right side
    20,940.24x = 452,895,349.42
  5. Step 5: Solve for x
    x = 452,895,349.42/20,940.24
  6. Step 6: Final answer
    x = 21,627.99

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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.