Home / 45,332.60-68,021.18-20,390.28

Finding the Fourth Proportional to 45,332.60, 68,021.18 and 20,390.28

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Solution

The fourth proportional to 45,332.60, 68,021.18 and 20,390.28 is: 30,595.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,332.60 : 68,021.18 = 20,390.28 : x
  2. Step 2: Convert to fraction form
    45,332.60/68,021.18 = 20,390.28/x
  3. Step 3: Cross multiply
    45,332.60x = 68,021.18 × 20,390.28
  4. Step 4: Simplify right side
    45,332.60x = 1,386,970,906.13
  5. Step 5: Solve for x
    x = 1,386,970,906.13/45,332.60
  6. Step 6: Final answer
    x = 30,595.44

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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.