Home / 20,713.12-28,587.12-11,758.76

Finding the Fourth Proportional to 20,713.12, 28,587.12 and 11,758.76

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Solution

The fourth proportional to 20,713.12, 28,587.12 and 11,758.76 is: 16,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,713.12 : 28,587.12 = 11,758.76 : x
  2. Step 2: Convert to fraction form
    20,713.12/28,587.12 = 11,758.76/x
  3. Step 3: Cross multiply
    20,713.12x = 28,587.12 × 11,758.76
  4. Step 4: Simplify right side
    20,713.12x = 336,149,083.17
  5. Step 5: Solve for x
    x = 336,149,083.17/20,713.12
  6. Step 6: Final answer
    x = 16,228.80

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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.