Home / 20,289.78-28,000.04-11,337.66

Finding the Fourth Proportional to 20,289.78, 28,000.04 and 11,337.66

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Solution

The fourth proportional to 20,289.78, 28,000.04 and 11,337.66 is: 15,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,289.78 : 28,000.04 = 11,337.66 : x
  2. Step 2: Convert to fraction form
    20,289.78/28,000.04 = 11,337.66/x
  3. Step 3: Cross multiply
    20,289.78x = 28,000.04 × 11,337.66
  4. Step 4: Simplify right side
    20,289.78x = 317,454,876.82
  5. Step 5: Solve for x
    x = 317,454,876.82/20,289.78
  6. Step 6: Final answer
    x = 15,646.05

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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.