Home / 28,109.87-42,160.03-9,387.79

Finding the Fourth Proportional to 28,109.87, 42,160.03 and 9,387.79

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Solution

The fourth proportional to 28,109.87, 42,160.03 and 9,387.79 is: 14,080.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.87 : 42,160.03 = 9,387.79 : x
  2. Step 2: Convert to fraction form
    28,109.87/42,160.03 = 9,387.79/x
  3. Step 3: Cross multiply
    28,109.87x = 42,160.03 × 9,387.79
  4. Step 4: Simplify right side
    28,109.87x = 395,789,508.03
  5. Step 5: Solve for x
    x = 395,789,508.03/28,109.87
  6. Step 6: Final answer
    x = 14,080.09

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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.