Home / 20,608.72-28,440.05-11,177.28

Finding the Fourth Proportional to 20,608.72, 28,440.05 and 11,177.28

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Solution

The fourth proportional to 20,608.72, 28,440.05 and 11,177.28 is: 15,424.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.72 : 28,440.05 = 11,177.28 : x
  2. Step 2: Convert to fraction form
    20,608.72/28,440.05 = 11,177.28/x
  3. Step 3: Cross multiply
    20,608.72x = 28,440.05 × 11,177.28
  4. Step 4: Simplify right side
    20,608.72x = 317,882,402.06
  5. Step 5: Solve for x
    x = 317,882,402.06/20,608.72
  6. Step 6: Final answer
    x = 15,424.66

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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.