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Finding the Fourth Proportional to 28,440.92, 42,661.38 and 7,664.42

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Solution

The fourth proportional to 28,440.92, 42,661.38 and 7,664.42 is: 11,496.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.92 : 42,661.38 = 7,664.42 : x
  2. Step 2: Convert to fraction form
    28,440.92/42,661.38 = 7,664.42/x
  3. Step 3: Cross multiply
    28,440.92x = 42,661.38 × 7,664.42
  4. Step 4: Simplify right side
    28,440.92x = 326,974,734.10
  5. Step 5: Solve for x
    x = 326,974,734.10/28,440.92
  6. Step 6: Final answer
    x = 11,496.63

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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.