Home / 20,738.16-28,618.56-11,306.70

Finding the Fourth Proportional to 20,738.16, 28,618.56 and 11,306.70

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Solution

The fourth proportional to 20,738.16, 28,618.56 and 11,306.70 is: 15,603.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.16 : 28,618.56 = 11,306.70 : x
  2. Step 2: Convert to fraction form
    20,738.16/28,618.56 = 11,306.70/x
  3. Step 3: Cross multiply
    20,738.16x = 28,618.56 × 11,306.70
  4. Step 4: Simplify right side
    20,738.16x = 323,581,472.35
  5. Step 5: Solve for x
    x = 323,581,472.35/20,738.16
  6. Step 6: Final answer
    x = 15,603.19

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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.