Home / 5,021.13-7,528.98-3,987.78

Finding the Fourth Proportional to 5,021.13, 7,528.98 and 3,987.78

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Solution

The fourth proportional to 5,021.13, 7,528.98 and 3,987.78 is: 5,979.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,021.13 : 7,528.98 = 3,987.78 : x
  2. Step 2: Convert to fraction form
    5,021.13/7,528.98 = 3,987.78/x
  3. Step 3: Cross multiply
    5,021.13x = 7,528.98 × 3,987.78
  4. Step 4: Simplify right side
    5,021.13x = 30,023,915.86
  5. Step 5: Solve for x
    x = 30,023,915.86/5,021.13
  6. Step 6: Final answer
    x = 5,979.51

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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.