Home / 20,619.18-30,931.79-7,468.47

Finding the Fourth Proportional to 20,619.18, 30,931.79 and 7,468.47

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Solution

The fourth proportional to 20,619.18, 30,931.79 and 7,468.47 is: 11,203.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.18 : 30,931.79 = 7,468.47 : x
  2. Step 2: Convert to fraction form
    20,619.18/30,931.79 = 7,468.47/x
  3. Step 3: Cross multiply
    20,619.18x = 30,931.79 × 7,468.47
  4. Step 4: Simplify right side
    20,619.18x = 231,013,145.66
  5. Step 5: Solve for x
    x = 231,013,145.66/20,619.18
  6. Step 6: Final answer
    x = 11,203.80

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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.