Home / 12,543.53-18,812.25-4,221.38

Finding the Fourth Proportional to 12,543.53, 18,812.25 and 4,221.38

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Solution

The fourth proportional to 12,543.53, 18,812.25 and 4,221.38 is: 6,331.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.53 : 18,812.25 = 4,221.38 : x
  2. Step 2: Convert to fraction form
    12,543.53/18,812.25 = 4,221.38/x
  3. Step 3: Cross multiply
    12,543.53x = 18,812.25 × 4,221.38
  4. Step 4: Simplify right side
    12,543.53x = 79,413,702.94
  5. Step 5: Solve for x
    x = 79,413,702.94/12,543.53
  6. Step 6: Final answer
    x = 6,331.05

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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.