Home / 45,406.54-68,109.12-20,428.95

Finding the Fourth Proportional to 45,406.54, 68,109.12 and 20,428.95

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Solution

The fourth proportional to 45,406.54, 68,109.12 and 20,428.95 is: 30,643.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,406.54 : 68,109.12 = 20,428.95 : x
  2. Step 2: Convert to fraction form
    45,406.54/68,109.12 = 20,428.95/x
  3. Step 3: Cross multiply
    45,406.54x = 68,109.12 × 20,428.95
  4. Step 4: Simplify right side
    45,406.54x = 1,391,397,819.78
  5. Step 5: Solve for x
    x = 1,391,397,819.78/45,406.54
  6. Step 6: Final answer
    x = 30,643.12

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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.