Home / 2,987.55-4,121.69-1,925.10

Finding the Fourth Proportional to 2,987.55, 4,121.69 and 1,925.10

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Solution

The fourth proportional to 2,987.55, 4,121.69 and 1,925.10 is: 2,655.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.55 : 4,121.69 = 1,925.10 : x
  2. Step 2: Convert to fraction form
    2,987.55/4,121.69 = 1,925.10/x
  3. Step 3: Cross multiply
    2,987.55x = 4,121.69 × 1,925.10
  4. Step 4: Simplify right side
    2,987.55x = 7,934,655.79
  5. Step 5: Solve for x
    x = 7,934,655.79/2,987.55
  6. Step 6: Final answer
    x = 2,655.91

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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.