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Finding the Fourth Proportional to 28,627.70, 42,945.60 and 8,904.20

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Solution

The fourth proportional to 28,627.70, 42,945.60 and 8,904.20 is: 13,357.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,627.70 : 42,945.60 = 8,904.20 : x
  2. Step 2: Convert to fraction form
    28,627.70/42,945.60 = 8,904.20/x
  3. Step 3: Cross multiply
    28,627.70x = 42,945.60 × 8,904.20
  4. Step 4: Simplify right side
    28,627.70x = 382,396,211.52
  5. Step 5: Solve for x
    x = 382,396,211.52/28,627.70
  6. Step 6: Final answer
    x = 13,357.56

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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.