Home / 3,860.38-5,332.58-2,987.20

Finding the Fourth Proportional to 3,860.38, 5,332.58 and 2,987.20

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Solution

The fourth proportional to 3,860.38, 5,332.58 and 2,987.20 is: 4,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,860.38 : 5,332.58 = 2,987.20 : x
  2. Step 2: Convert to fraction form
    3,860.38/5,332.58 = 2,987.20/x
  3. Step 3: Cross multiply
    3,860.38x = 5,332.58 × 2,987.20
  4. Step 4: Simplify right side
    3,860.38x = 15,929,482.98
  5. Step 5: Solve for x
    x = 15,929,482.98/3,860.38
  6. Step 6: Final answer
    x = 4,126.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.