Home / 20,747.57-28,630.78-11,316.13

Finding the Fourth Proportional to 20,747.57, 28,630.78 and 11,316.13

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Solution

The fourth proportional to 20,747.57, 28,630.78 and 11,316.13 is: 15,615.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.57 : 28,630.78 = 11,316.13 : x
  2. Step 2: Convert to fraction form
    20,747.57/28,630.78 = 11,316.13/x
  3. Step 3: Cross multiply
    20,747.57x = 28,630.78 × 11,316.13
  4. Step 4: Simplify right side
    20,747.57x = 323,989,528.61
  5. Step 5: Solve for x
    x = 323,989,528.61/20,747.57
  6. Step 6: Final answer
    x = 15,615.79

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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.