Home / 20,765.16-28,656.90-11,333.76

Finding the Fourth Proportional to 20,765.16, 28,656.90 and 11,333.76

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Solution

The fourth proportional to 20,765.16, 28,656.90 and 11,333.76 is: 15,641.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.16 : 28,656.90 = 11,333.76 : x
  2. Step 2: Convert to fraction form
    20,765.16/28,656.90 = 11,333.76/x
  3. Step 3: Cross multiply
    20,765.16x = 28,656.90 × 11,333.76
  4. Step 4: Simplify right side
    20,765.16x = 324,790,426.94
  5. Step 5: Solve for x
    x = 324,790,426.94/20,765.16
  6. Step 6: Final answer
    x = 15,641.12

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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.