Home / 20,587.08-28,410.17-11,155.64

Finding the Fourth Proportional to 20,587.08, 28,410.17 and 11,155.64

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Solution

The fourth proportional to 20,587.08, 28,410.17 and 11,155.64 is: 15,394.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.08 : 28,410.17 = 11,155.64 : x
  2. Step 2: Convert to fraction form
    20,587.08/28,410.17 = 11,155.64/x
  3. Step 3: Cross multiply
    20,587.08x = 28,410.17 × 11,155.64
  4. Step 4: Simplify right side
    20,587.08x = 316,933,622.21
  5. Step 5: Solve for x
    x = 316,933,622.21/20,587.08
  6. Step 6: Final answer
    x = 15,394.78

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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.