Home / 20,240.28-30,360.42-19,686.78

Finding the Fourth Proportional to 20,240.28, 30,360.42 and 19,686.78

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Solution

The fourth proportional to 20,240.28, 30,360.42 and 19,686.78 is: 29,530.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.28 : 30,360.42 = 19,686.78 : x
  2. Step 2: Convert to fraction form
    20,240.28/30,360.42 = 19,686.78/x
  3. Step 3: Cross multiply
    20,240.28x = 30,360.42 × 19,686.78
  4. Step 4: Simplify right side
    20,240.28x = 597,698,909.25
  5. Step 5: Solve for x
    x = 597,698,909.25/20,240.28
  6. Step 6: Final answer
    x = 29,530.17

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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.