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Finding the Fourth Proportional to 28,570.39, 42,866.87 and 8,850.49

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Solution

The fourth proportional to 28,570.39, 42,866.87 and 8,850.49 is: 13,279.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,570.39 : 42,866.87 = 8,850.49 : x
  2. Step 2: Convert to fraction form
    28,570.39/42,866.87 = 8,850.49/x
  3. Step 3: Cross multiply
    28,570.39x = 42,866.87 × 8,850.49
  4. Step 4: Simplify right side
    28,570.39x = 379,392,702.63
  5. Step 5: Solve for x
    x = 379,392,702.63/28,570.39
  6. Step 6: Final answer
    x = 13,279.23

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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.