Home / 2,987.12-4,123.34-2,565.78

Finding the Fourth Proportional to 2,987.12, 4,123.34 and 2,565.78

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Solution

The fourth proportional to 2,987.12, 4,123.34 and 2,565.78 is: 3,541.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.12 : 4,123.34 = 2,565.78 : x
  2. Step 2: Convert to fraction form
    2,987.12/4,123.34 = 2,565.78/x
  3. Step 3: Cross multiply
    2,987.12x = 4,123.34 × 2,565.78
  4. Step 4: Simplify right side
    2,987.12x = 10,579,583.31
  5. Step 5: Solve for x
    x = 10,579,583.31/2,987.12
  6. Step 6: Final answer
    x = 3,541.73

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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.