Home / 10,987.80-16,470.90-5,436.60

Finding the Fourth Proportional to 10,987.80, 16,470.90 and 5,436.60

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Solution

The fourth proportional to 10,987.80, 16,470.90 and 5,436.60 is: 8,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.80 : 16,470.90 = 5,436.60 : x
  2. Step 2: Convert to fraction form
    10,987.80/16,470.90 = 5,436.60/x
  3. Step 3: Cross multiply
    10,987.80x = 16,470.90 × 5,436.60
  4. Step 4: Simplify right side
    10,987.80x = 89,545,694.94
  5. Step 5: Solve for x
    x = 89,545,694.94/10,987.80
  6. Step 6: Final answer
    x = 8,149.56

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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.