Home / 5,120.19-7,681.37-1,659.87

Finding the Fourth Proportional to 5,120.19, 7,681.37 and 1,659.87

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Solution

The fourth proportional to 5,120.19, 7,681.37 and 1,659.87 is: 2,490.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.19 : 7,681.37 = 1,659.87 : x
  2. Step 2: Convert to fraction form
    5,120.19/7,681.37 = 1,659.87/x
  3. Step 3: Cross multiply
    5,120.19x = 7,681.37 × 1,659.87
  4. Step 4: Simplify right side
    5,120.19x = 12,750,067.32
  5. Step 5: Solve for x
    x = 12,750,067.32/5,120.19
  6. Step 6: Final answer
    x = 2,490.16

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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.