Home / 5,143.80-7,098.22-2,905.72

Finding the Fourth Proportional to 5,143.80, 7,098.22 and 2,905.72

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Solution

The fourth proportional to 5,143.80, 7,098.22 and 2,905.72 is: 4,009.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.80 : 7,098.22 = 2,905.72 : x
  2. Step 2: Convert to fraction form
    5,143.80/7,098.22 = 2,905.72/x
  3. Step 3: Cross multiply
    5,143.80x = 7,098.22 × 2,905.72
  4. Step 4: Simplify right side
    5,143.80x = 20,625,439.82
  5. Step 5: Solve for x
    x = 20,625,439.82/5,143.80
  6. Step 6: Final answer
    x = 4,009.77

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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.