Home / 20,665.13-28,518.08-11,233.89

Finding the Fourth Proportional to 20,665.13, 28,518.08 and 11,233.89

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Solution

The fourth proportional to 20,665.13, 28,518.08 and 11,233.89 is: 15,502.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.13 : 28,518.08 = 11,233.89 : x
  2. Step 2: Convert to fraction form
    20,665.13/28,518.08 = 11,233.89/x
  3. Step 3: Cross multiply
    20,665.13x = 28,518.08 × 11,233.89
  4. Step 4: Simplify right side
    20,665.13x = 320,368,917.56
  5. Step 5: Solve for x
    x = 320,368,917.56/20,665.13
  6. Step 6: Final answer
    x = 15,502.88

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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.