Home / 20,306.12-28,020.14-11,353.32

Finding the Fourth Proportional to 20,306.12, 28,020.14 and 11,353.32

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Solution

The fourth proportional to 20,306.12, 28,020.14 and 11,353.32 is: 15,666.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.12 : 28,020.14 = 11,353.32 : x
  2. Step 2: Convert to fraction form
    20,306.12/28,020.14 = 11,353.32/x
  3. Step 3: Cross multiply
    20,306.12x = 28,020.14 × 11,353.32
  4. Step 4: Simplify right side
    20,306.12x = 318,121,559.10
  5. Step 5: Solve for x
    x = 318,121,559.10/20,306.12
  6. Step 6: Final answer
    x = 15,666.29

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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.