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Finding the Fourth Proportional to 28,369.53, 42,560.78 and 8,648.46

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Solution

The fourth proportional to 28,369.53, 42,560.78 and 8,648.46 is: 12,974.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369.53 : 42,560.78 = 8,648.46 : x
  2. Step 2: Convert to fraction form
    28,369.53/42,560.78 = 8,648.46/x
  3. Step 3: Cross multiply
    28,369.53x = 42,560.78 × 8,648.46
  4. Step 4: Simplify right side
    28,369.53x = 368,085,160.16
  5. Step 5: Solve for x
    x = 368,085,160.16/28,369.53
  6. Step 6: Final answer
    x = 12,974.67

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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.