Home / 20,738.42-28,618.80-11,306.78

Finding the Fourth Proportional to 20,738.42, 28,618.80 and 11,306.78

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Solution

The fourth proportional to 20,738.42, 28,618.80 and 11,306.78 is: 15,603.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.42 : 28,618.80 = 11,306.78 : x
  2. Step 2: Convert to fraction form
    20,738.42/28,618.80 = 11,306.78/x
  3. Step 3: Cross multiply
    20,738.42x = 28,618.80 × 11,306.78
  4. Step 4: Simplify right side
    20,738.42x = 323,586,475.46
  5. Step 5: Solve for x
    x = 323,586,475.46/20,738.42
  6. Step 6: Final answer
    x = 15,603.24

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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.