Home / 21,025.92-28,981.94-15,351.68

Finding the Fourth Proportional to 21,025.92, 28,981.94 and 15,351.68

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Solution

The fourth proportional to 21,025.92, 28,981.94 and 15,351.68 is: 21,160.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.92 : 28,981.94 = 15,351.68 : x
  2. Step 2: Convert to fraction form
    21,025.92/28,981.94 = 15,351.68/x
  3. Step 3: Cross multiply
    21,025.92x = 28,981.94 × 15,351.68
  4. Step 4: Simplify right side
    21,025.92x = 444,921,468.66
  5. Step 5: Solve for x
    x = 444,921,468.66/21,025.92
  6. Step 6: Final answer
    x = 21,160.62

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1.5x scale

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.