Home / 15,478.92-21,366.36-9,191.25

Finding the Fourth Proportional to 15,478.92, 21,366.36 and 9,191.25

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Solution

The fourth proportional to 15,478.92, 21,366.36 and 9,191.25 is: 12,687.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.92 : 21,366.36 = 9,191.25 : x
  2. Step 2: Convert to fraction form
    15,478.92/21,366.36 = 9,191.25/x
  3. Step 3: Cross multiply
    15,478.92x = 21,366.36 × 9,191.25
  4. Step 4: Simplify right side
    15,478.92x = 196,383,556.35
  5. Step 5: Solve for x
    x = 196,383,556.35/15,478.92
  6. Step 6: Final answer
    x = 12,687.16

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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.