Home / 12,280.28-18,418.54-3,959.16

Finding the Fourth Proportional to 12,280.28, 18,418.54 and 3,959.16

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Solution

The fourth proportional to 12,280.28, 18,418.54 and 3,959.16 is: 5,938.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.28 : 18,418.54 = 3,959.16 : x
  2. Step 2: Convert to fraction form
    12,280.28/18,418.54 = 3,959.16/x
  3. Step 3: Cross multiply
    12,280.28x = 18,418.54 × 3,959.16
  4. Step 4: Simplify right side
    12,280.28x = 72,921,946.83
  5. Step 5: Solve for x
    x = 72,921,946.83/12,280.28
  6. Step 6: Final answer
    x = 5,938.13

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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.