Home / 20,758.24-31,145.40-7,619.68

Finding the Fourth Proportional to 20,758.24, 31,145.40 and 7,619.68

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Solution

The fourth proportional to 20,758.24, 31,145.40 and 7,619.68 is: 11,432.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.24 : 31,145.40 = 7,619.68 : x
  2. Step 2: Convert to fraction form
    20,758.24/31,145.40 = 7,619.68/x
  3. Step 3: Cross multiply
    20,758.24x = 31,145.40 × 7,619.68
  4. Step 4: Simplify right side
    20,758.24x = 237,317,981.47
  5. Step 5: Solve for x
    x = 237,317,981.47/20,758.24
  6. Step 6: Final answer
    x = 11,432.47

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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.