Home / 20,587.20-28,410.36-11,155.68

Finding the Fourth Proportional to 20,587.20, 28,410.36 and 11,155.68

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Solution

The fourth proportional to 20,587.20, 28,410.36 and 11,155.68 is: 15,394.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.20 : 28,410.36 = 11,155.68 : x
  2. Step 2: Convert to fraction form
    20,587.20/28,410.36 = 11,155.68/x
  3. Step 3: Cross multiply
    20,587.20x = 28,410.36 × 11,155.68
  4. Step 4: Simplify right side
    20,587.20x = 316,936,884.84
  5. Step 5: Solve for x
    x = 316,936,884.84/20,587.20
  6. Step 6: Final answer
    x = 15,394.85

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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.