Home / 28,109.05-42,170.19-9,133.62

Finding the Fourth Proportional to 28,109.05, 42,170.19 and 9,133.62

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Solution

The fourth proportional to 28,109.05, 42,170.19 and 9,133.62 is: 13,702.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.05 : 42,170.19 = 9,133.62 : x
  2. Step 2: Convert to fraction form
    28,109.05/42,170.19 = 9,133.62/x
  3. Step 3: Cross multiply
    28,109.05x = 42,170.19 × 9,133.62
  4. Step 4: Simplify right side
    28,109.05x = 385,166,671.97
  5. Step 5: Solve for x
    x = 385,166,671.97/28,109.05
  6. Step 6: Final answer
    x = 13,702.59

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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.