Home / 12,147.56-18,219.90-4,248.80

Finding the Fourth Proportional to 12,147.56, 18,219.90 and 4,248.80

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Solution

The fourth proportional to 12,147.56, 18,219.90 and 4,248.80 is: 6,372.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.56 : 18,219.90 = 4,248.80 : x
  2. Step 2: Convert to fraction form
    12,147.56/18,219.90 = 4,248.80/x
  3. Step 3: Cross multiply
    12,147.56x = 18,219.90 × 4,248.80
  4. Step 4: Simplify right side
    12,147.56x = 77,412,711.12
  5. Step 5: Solve for x
    x = 77,412,711.12/12,147.56
  6. Step 6: Final answer
    x = 6,372.70

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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.