Home / 12,278.28-18,417.39-3,513.18

Finding the Fourth Proportional to 12,278.28, 18,417.39 and 3,513.18

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Solution

The fourth proportional to 12,278.28, 18,417.39 and 3,513.18 is: 5,269.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.28 : 18,417.39 = 3,513.18 : x
  2. Step 2: Convert to fraction form
    12,278.28/18,417.39 = 3,513.18/x
  3. Step 3: Cross multiply
    12,278.28x = 18,417.39 × 3,513.18
  4. Step 4: Simplify right side
    12,278.28x = 64,703,606.20
  5. Step 5: Solve for x
    x = 64,703,606.20/12,278.28
  6. Step 6: Final answer
    x = 5,269.76

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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.