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Finding the Fourth Proportional to 15,855.62, 21,879.20 and 9,480.93

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Solution

The fourth proportional to 15,855.62, 21,879.20 and 9,480.93 is: 13,082.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.62 : 21,879.20 = 9,480.93 : x
  2. Step 2: Convert to fraction form
    15,855.62/21,879.20 = 9,480.93/x
  3. Step 3: Cross multiply
    15,855.62x = 21,879.20 × 9,480.93
  4. Step 4: Simplify right side
    15,855.62x = 207,435,116.25
  5. Step 5: Solve for x
    x = 207,435,116.25/15,855.62
  6. Step 6: Final answer
    x = 13,082.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.