Home / 12,543.19-18,814.82-5,147.76

Finding the Fourth Proportional to 12,543.19, 18,814.82 and 5,147.76

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Solution

The fourth proportional to 12,543.19, 18,814.82 and 5,147.76 is: 7,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.19 : 18,814.82 = 5,147.76 : x
  2. Step 2: Convert to fraction form
    12,543.19/18,814.82 = 5,147.76/x
  3. Step 3: Cross multiply
    12,543.19x = 18,814.82 × 5,147.76
  4. Step 4: Simplify right side
    12,543.19x = 96,854,177.80
  5. Step 5: Solve for x
    x = 96,854,177.80/12,543.19
  6. Step 6: Final answer
    x = 7,721.65

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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.