Home / 3,987.60-5,976.48-1,387.50

Finding the Fourth Proportional to 3,987.60, 5,976.48 and 1,387.50

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Solution

The fourth proportional to 3,987.60, 5,976.48 and 1,387.50 is: 2,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.60 : 5,976.48 = 1,387.50 : x
  2. Step 2: Convert to fraction form
    3,987.60/5,976.48 = 1,387.50/x
  3. Step 3: Cross multiply
    3,987.60x = 5,976.48 × 1,387.50
  4. Step 4: Simplify right side
    3,987.60x = 8,292,366.00
  5. Step 5: Solve for x
    x = 8,292,366.00/3,987.60
  6. Step 6: Final answer
    x = 2,079.54

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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.