Home / 30,819.57-42,457.20-29,318.78

Finding the Fourth Proportional to 30,819.57, 42,457.20 and 29,318.78

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Solution

The fourth proportional to 30,819.57, 42,457.20 and 29,318.78 is: 40,389.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,819.57 : 42,457.20 = 29,318.78 : x
  2. Step 2: Convert to fraction form
    30,819.57/42,457.20 = 29,318.78/x
  3. Step 3: Cross multiply
    30,819.57x = 42,457.20 × 29,318.78
  4. Step 4: Simplify right side
    30,819.57x = 1,244,793,093.93
  5. Step 5: Solve for x
    x = 1,244,793,093.93/30,819.57
  6. Step 6: Final answer
    x = 40,389.70

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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.