Home / 15,478.26-21,359.58-8,763.78

Finding the Fourth Proportional to 15,478.26, 21,359.58 and 8,763.78

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Solution

The fourth proportional to 15,478.26, 21,359.58 and 8,763.78 is: 12,093.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.26 : 21,359.58 = 8,763.78 : x
  2. Step 2: Convert to fraction form
    15,478.26/21,359.58 = 8,763.78/x
  3. Step 3: Cross multiply
    15,478.26x = 21,359.58 × 8,763.78
  4. Step 4: Simplify right side
    15,478.26x = 187,190,660.01
  5. Step 5: Solve for x
    x = 187,190,660.01/15,478.26
  6. Step 6: Final answer
    x = 12,093.78

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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.