Home / 2,987.10-4,123.44-1,807.92

Finding the Fourth Proportional to 2,987.10, 4,123.44 and 1,807.92

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Solution

The fourth proportional to 2,987.10, 4,123.44 and 1,807.92 is: 2,495.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.10 : 4,123.44 = 1,807.92 : x
  2. Step 2: Convert to fraction form
    2,987.10/4,123.44 = 1,807.92/x
  3. Step 3: Cross multiply
    2,987.10x = 4,123.44 × 1,807.92
  4. Step 4: Simplify right side
    2,987.10x = 7,454,849.64
  5. Step 5: Solve for x
    x = 7,454,849.64/2,987.10
  6. Step 6: Final answer
    x = 2,495.68

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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.