Home / 19,233.20-28,812.40-12,639.52

Finding the Fourth Proportional to 19,233.20, 28,812.40 and 12,639.52

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Solution

The fourth proportional to 19,233.20, 28,812.40 and 12,639.52 is: 18,934.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,233.20 : 28,812.40 = 12,639.52 : x
  2. Step 2: Convert to fraction form
    19,233.20/28,812.40 = 12,639.52/x
  3. Step 3: Cross multiply
    19,233.20x = 28,812.40 × 12,639.52
  4. Step 4: Simplify right side
    19,233.20x = 364,174,906.05
  5. Step 5: Solve for x
    x = 364,174,906.05/19,233.20
  6. Step 6: Final answer
    x = 18,934.70

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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.