Home / 20,306.08-28,023-11,231.56

Finding the Fourth Proportional to 20,306.08, 28,023 and 11,231.56

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Solution

The fourth proportional to 20,306.08, 28,023 and 11,231.56 is: 15,499.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.08 : 28,023 = 11,231.56 : x
  2. Step 2: Convert to fraction form
    20,306.08/28,023 = 11,231.56/x
  3. Step 3: Cross multiply
    20,306.08x = 28,023 × 11,231.56
  4. Step 4: Simplify right side
    20,306.08x = 314,742,005.88
  5. Step 5: Solve for x
    x = 314,742,005.88/20,306.08
  6. Step 6: Final answer
    x = 15,499.89

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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.