Home / 12,188.52-18,280.18-3,869.28

Finding the Fourth Proportional to 12,188.52, 18,280.18 and 3,869.28

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Solution

The fourth proportional to 12,188.52, 18,280.18 and 3,869.28 is: 5,803.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.52 : 18,280.18 = 3,869.28 : x
  2. Step 2: Convert to fraction form
    12,188.52/18,280.18 = 3,869.28/x
  3. Step 3: Cross multiply
    12,188.52x = 18,280.18 × 3,869.28
  4. Step 4: Simplify right side
    12,188.52x = 70,731,134.87
  5. Step 5: Solve for x
    x = 70,731,134.87/12,188.52
  6. Step 6: Final answer
    x = 5,803.09

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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.