Home / 20,608.15-28,439.28-11,176.72

Finding the Fourth Proportional to 20,608.15, 28,439.28 and 11,176.72

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Solution

The fourth proportional to 20,608.15, 28,439.28 and 11,176.72 is: 15,423.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.15 : 28,439.28 = 11,176.72 : x
  2. Step 2: Convert to fraction form
    20,608.15/28,439.28 = 11,176.72/x
  3. Step 3: Cross multiply
    20,608.15x = 28,439.28 × 11,176.72
  4. Step 4: Simplify right side
    20,608.15x = 317,857,869.56
  5. Step 5: Solve for x
    x = 317,857,869.56/20,608.15
  6. Step 6: Final answer
    x = 15,423.89

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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.