Home / 2,987.28-4,478.16-2,013.72

Finding the Fourth Proportional to 2,987.28, 4,478.16 and 2,013.72

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Solution

The fourth proportional to 2,987.28, 4,478.16 and 2,013.72 is: 3,018.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.28 : 4,478.16 = 2,013.72 : x
  2. Step 2: Convert to fraction form
    2,987.28/4,478.16 = 2,013.72/x
  3. Step 3: Cross multiply
    2,987.28x = 4,478.16 × 2,013.72
  4. Step 4: Simplify right side
    2,987.28x = 9,017,760.36
  5. Step 5: Solve for x
    x = 9,017,760.36/2,987.28
  6. Step 6: Final answer
    x = 3,018.72

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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.