Home / 47,487.12-71,230.68-12,429.78

Finding the Fourth Proportional to 47,487.12, 71,230.68 and 12,429.78

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Solution

The fourth proportional to 47,487.12, 71,230.68 and 12,429.78 is: 18,644.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,487.12 : 71,230.68 = 12,429.78 : x
  2. Step 2: Convert to fraction form
    47,487.12/71,230.68 = 12,429.78/x
  3. Step 3: Cross multiply
    47,487.12x = 71,230.68 × 12,429.78
  4. Step 4: Simplify right side
    47,487.12x = 885,381,681.65
  5. Step 5: Solve for x
    x = 885,381,681.65/47,487.12
  6. Step 6: Final answer
    x = 18,644.67

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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.