Home / 12,280.28-18,420.39-3,515.18

Finding the Fourth Proportional to 12,280.28, 18,420.39 and 3,515.18

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Solution

The fourth proportional to 12,280.28, 18,420.39 and 3,515.18 is: 5,272.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,280.28 : 18,420.39 = 3,515.18 : x
  2. Step 2: Convert to fraction form
    12,280.28/18,420.39 = 3,515.18/x
  3. Step 3: Cross multiply
    12,280.28x = 18,420.39 × 3,515.18
  4. Step 4: Simplify right side
    12,280.28x = 64,750,986.52
  5. Step 5: Solve for x
    x = 64,750,986.52/12,280.28
  6. Step 6: Final answer
    x = 5,272.76

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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.