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Finding the Fourth Proportional to 20,475.76, 30,718.48 and 6,624.76

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Solution

The fourth proportional to 20,475.76, 30,718.48 and 6,624.76 is: 9,938.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.76 : 30,718.48 = 6,624.76 : x
  2. Step 2: Convert to fraction form
    20,475.76/30,718.48 = 6,624.76/x
  3. Step 3: Cross multiply
    20,475.76x = 30,718.48 × 6,624.76
  4. Step 4: Simplify right side
    20,475.76x = 203,502,557.56
  5. Step 5: Solve for x
    x = 203,502,557.56/20,475.76
  6. Step 6: Final answer
    x = 9,938.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.