Home / 3,987.40-5,981.10-2,528.20

Finding the Fourth Proportional to 3,987.40, 5,981.10 and 2,528.20

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Solution

The fourth proportional to 3,987.40, 5,981.10 and 2,528.20 is: 3,792.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.40 : 5,981.10 = 2,528.20 : x
  2. Step 2: Convert to fraction form
    3,987.40/5,981.10 = 2,528.20/x
  3. Step 3: Cross multiply
    3,987.40x = 5,981.10 × 2,528.20
  4. Step 4: Simplify right side
    3,987.40x = 15,121,417.02
  5. Step 5: Solve for x
    x = 15,121,417.02/3,987.40
  6. Step 6: Final answer
    x = 3,792.30

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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.