Home / 12,142.12-18,213.17-4,356.40

Finding the Fourth Proportional to 12,142.12, 18,213.17 and 4,356.40

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Solution

The fourth proportional to 12,142.12, 18,213.17 and 4,356.40 is: 6,534.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.12 : 18,213.17 = 4,356.40 : x
  2. Step 2: Convert to fraction form
    12,142.12/18,213.17 = 4,356.40/x
  3. Step 3: Cross multiply
    12,142.12x = 18,213.17 × 4,356.40
  4. Step 4: Simplify right side
    12,142.12x = 79,343,853.79
  5. Step 5: Solve for x
    x = 79,343,853.79/12,142.12
  6. Step 6: Final answer
    x = 6,534.60

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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.