Home / 28,078.50-42,121.84-11,439.55

Finding the Fourth Proportional to 28,078.50, 42,121.84 and 11,439.55

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Solution

The fourth proportional to 28,078.50, 42,121.84 and 11,439.55 is: 17,160.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.50 : 42,121.84 = 11,439.55 : x
  2. Step 2: Convert to fraction form
    28,078.50/42,121.84 = 11,439.55/x
  3. Step 3: Cross multiply
    28,078.50x = 42,121.84 × 11,439.55
  4. Step 4: Simplify right side
    28,078.50x = 481,854,894.77
  5. Step 5: Solve for x
    x = 481,854,894.77/28,078.50
  6. Step 6: Final answer
    x = 17,160.99

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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.