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Finding the Fourth Proportional to 15,960.50, 22,025.28 and 8,790.28

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Solution

The fourth proportional to 15,960.50, 22,025.28 and 8,790.28 is: 12,130.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,960.50 : 22,025.28 = 8,790.28 : x
  2. Step 2: Convert to fraction form
    15,960.50/22,025.28 = 8,790.28/x
  3. Step 3: Cross multiply
    15,960.50x = 22,025.28 × 8,790.28
  4. Step 4: Simplify right side
    15,960.50x = 193,608,288.12
  5. Step 5: Solve for x
    x = 193,608,288.12/15,960.50
  6. Step 6: Final answer
    x = 12,130.47

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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.