Home / 20,702.56-28,568.76-11,270.88

Finding the Fourth Proportional to 20,702.56, 28,568.76 and 11,270.88

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Solution

The fourth proportional to 20,702.56, 28,568.76 and 11,270.88 is: 15,553.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.56 : 28,568.76 = 11,270.88 : x
  2. Step 2: Convert to fraction form
    20,702.56/28,568.76 = 11,270.88/x
  3. Step 3: Cross multiply
    20,702.56x = 28,568.76 × 11,270.88
  4. Step 4: Simplify right side
    20,702.56x = 321,995,065.71
  5. Step 5: Solve for x
    x = 321,995,065.71/20,702.56
  6. Step 6: Final answer
    x = 15,553.39

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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.