Home / 18,135.40-27,159.30-10,320.52

Finding the Fourth Proportional to 18,135.40, 27,159.30 and 10,320.52

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Solution

The fourth proportional to 18,135.40, 27,159.30 and 10,320.52 is: 15,455.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.40 : 27,159.30 = 10,320.52 : x
  2. Step 2: Convert to fraction form
    18,135.40/27,159.30 = 10,320.52/x
  3. Step 3: Cross multiply
    18,135.40x = 27,159.30 × 10,320.52
  4. Step 4: Simplify right side
    18,135.40x = 280,298,098.84
  5. Step 5: Solve for x
    x = 280,298,098.84/18,135.40
  6. Step 6: Final answer
    x = 15,455.85

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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.