Home / 20,665.10-28,518.12-11,233.86

Finding the Fourth Proportional to 20,665.10, 28,518.12 and 11,233.86

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Solution

The fourth proportional to 20,665.10, 28,518.12 and 11,233.86 is: 15,502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.10 : 28,518.12 = 11,233.86 : x
  2. Step 2: Convert to fraction form
    20,665.10/28,518.12 = 11,233.86/x
  3. Step 3: Cross multiply
    20,665.10x = 28,518.12 × 11,233.86
  4. Step 4: Simplify right side
    20,665.10x = 320,368,674.49
  5. Step 5: Solve for x
    x = 320,368,674.49/20,665.10
  6. Step 6: Final answer
    x = 15,502.89

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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.