Home / 30,115.60-45,242.65-21,251.34

Finding the Fourth Proportional to 30,115.60, 45,242.65 and 21,251.34

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Solution

The fourth proportional to 30,115.60, 45,242.65 and 21,251.34 is: 31,925.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,115.60 : 45,242.65 = 21,251.34 : x
  2. Step 2: Convert to fraction form
    30,115.60/45,242.65 = 21,251.34/x
  3. Step 3: Cross multiply
    30,115.60x = 45,242.65 × 21,251.34
  4. Step 4: Simplify right side
    30,115.60x = 961,466,836.97
  5. Step 5: Solve for x
    x = 961,466,836.97/30,115.60
  6. Step 6: Final answer
    x = 31,925.88

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1.5x scale

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.