Home / 20,424.48-28,179.60-11,471.04

Finding the Fourth Proportional to 20,424.48, 28,179.60 and 11,471.04

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Solution

The fourth proportional to 20,424.48, 28,179.60 and 11,471.04 is: 15,826.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.48 : 28,179.60 = 11,471.04 : x
  2. Step 2: Convert to fraction form
    20,424.48/28,179.60 = 11,471.04/x
  3. Step 3: Cross multiply
    20,424.48x = 28,179.60 × 11,471.04
  4. Step 4: Simplify right side
    20,424.48x = 323,249,318.78
  5. Step 5: Solve for x
    x = 323,249,318.78/20,424.48
  6. Step 6: Final answer
    x = 15,826.56

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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.