Home / 20,340.24-28,069.60-11,387.76

Finding the Fourth Proportional to 20,340.24, 28,069.60 and 11,387.76

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Solution

The fourth proportional to 20,340.24, 28,069.60 and 11,387.76 is: 15,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.24 : 28,069.60 = 11,387.76 : x
  2. Step 2: Convert to fraction form
    20,340.24/28,069.60 = 11,387.76/x
  3. Step 3: Cross multiply
    20,340.24x = 28,069.60 × 11,387.76
  4. Step 4: Simplify right side
    20,340.24x = 319,649,868.10
  5. Step 5: Solve for x
    x = 319,649,868.10/20,340.24
  6. Step 6: Final answer
    x = 15,715.15

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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.