Home / 12,543.40-18,817.91-4,222.78

Finding the Fourth Proportional to 12,543.40, 18,817.91 and 4,222.78

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Solution

The fourth proportional to 12,543.40, 18,817.91 and 4,222.78 is: 6,335.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.40 : 18,817.91 = 4,222.78 : x
  2. Step 2: Convert to fraction form
    12,543.40/18,817.91 = 4,222.78/x
  3. Step 3: Cross multiply
    12,543.40x = 18,817.91 × 4,222.78
  4. Step 4: Simplify right side
    12,543.40x = 79,463,799.90
  5. Step 5: Solve for x
    x = 79,463,799.90/12,543.40
  6. Step 6: Final answer
    x = 6,335.11

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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.