Home / 20,587.08-28,410.12-11,155.80

Finding the Fourth Proportional to 20,587.08, 28,410.12 and 11,155.80

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Solution

The fourth proportional to 20,587.08, 28,410.12 and 11,155.80 is: 15,394.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.08 : 28,410.12 = 11,155.80 : x
  2. Step 2: Convert to fraction form
    20,587.08/28,410.12 = 11,155.80/x
  3. Step 3: Cross multiply
    20,587.08x = 28,410.12 × 11,155.80
  4. Step 4: Simplify right side
    20,587.08x = 316,937,616.70
  5. Step 5: Solve for x
    x = 316,937,616.70/20,587.08
  6. Step 6: Final answer
    x = 15,394.98

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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.