Home / 12,218.28-18,238.95-10,742.12

Finding the Fourth Proportional to 12,218.28, 18,238.95 and 10,742.12

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Solution

The fourth proportional to 12,218.28, 18,238.95 and 10,742.12 is: 16,035.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.28 : 18,238.95 = 10,742.12 : x
  2. Step 2: Convert to fraction form
    12,218.28/18,238.95 = 10,742.12/x
  3. Step 3: Cross multiply
    12,218.28x = 18,238.95 × 10,742.12
  4. Step 4: Simplify right side
    12,218.28x = 195,924,989.57
  5. Step 5: Solve for x
    x = 195,924,989.57/12,218.28
  6. Step 6: Final answer
    x = 16,035.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.