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Finding the Fourth Proportional to 28,480.46, 42,725.54 and 8,758.58

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Solution

The fourth proportional to 28,480.46, 42,725.54 and 8,758.58 is: 13,139.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.46 : 42,725.54 = 8,758.58 : x
  2. Step 2: Convert to fraction form
    28,480.46/42,725.54 = 8,758.58/x
  3. Step 3: Cross multiply
    28,480.46x = 42,725.54 × 8,758.58
  4. Step 4: Simplify right side
    28,480.46x = 374,214,868.40
  5. Step 5: Solve for x
    x = 374,214,868.40/28,480.46
  6. Step 6: Final answer
    x = 13,139.36

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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.