Home / 28,187.62-42,278.07-7,412.74

Finding the Fourth Proportional to 28,187.62, 42,278.07 and 7,412.74

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Solution

The fourth proportional to 28,187.62, 42,278.07 and 7,412.74 is: 11,118.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.62 : 42,278.07 = 7,412.74 : x
  2. Step 2: Convert to fraction form
    28,187.62/42,278.07 = 7,412.74/x
  3. Step 3: Cross multiply
    28,187.62x = 42,278.07 × 7,412.74
  4. Step 4: Simplify right side
    28,187.62x = 313,396,340.61
  5. Step 5: Solve for x
    x = 313,396,340.61/28,187.62
  6. Step 6: Final answer
    x = 11,118.23

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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.