Home / 12,142.38-18,209.15-4,242.68

Finding the Fourth Proportional to 12,142.38, 18,209.15 and 4,242.68

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Solution

The fourth proportional to 12,142.38, 18,209.15 and 4,242.68 is: 6,362.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.38 : 18,209.15 = 4,242.68 : x
  2. Step 2: Convert to fraction form
    12,142.38/18,209.15 = 4,242.68/x
  3. Step 3: Cross multiply
    12,142.38x = 18,209.15 × 4,242.68
  4. Step 4: Simplify right side
    12,142.38x = 77,255,596.52
  5. Step 5: Solve for x
    x = 77,255,596.52/12,142.38
  6. Step 6: Final answer
    x = 6,362.48

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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.