Home / 20,305.18-28,019.85-11,353.42

Finding the Fourth Proportional to 20,305.18, 28,019.85 and 11,353.42

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Solution

The fourth proportional to 20,305.18, 28,019.85 and 11,353.42 is: 15,666.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.18 : 28,019.85 = 11,353.42 : x
  2. Step 2: Convert to fraction form
    20,305.18/28,019.85 = 11,353.42/x
  3. Step 3: Cross multiply
    20,305.18x = 28,019.85 × 11,353.42
  4. Step 4: Simplify right side
    20,305.18x = 318,121,125.39
  5. Step 5: Solve for x
    x = 318,121,125.39/20,305.18
  6. Step 6: Final answer
    x = 15,666.99

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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.