Home / 15,358.80-21,198.78-9,766.56

Finding the Fourth Proportional to 15,358.80, 21,198.78 and 9,766.56

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Solution

The fourth proportional to 15,358.80, 21,198.78 and 9,766.56 is: 13,480.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,358.80 : 21,198.78 = 9,766.56 : x
  2. Step 2: Convert to fraction form
    15,358.80/21,198.78 = 9,766.56/x
  3. Step 3: Cross multiply
    15,358.80x = 21,198.78 × 9,766.56
  4. Step 4: Simplify right side
    15,358.80x = 207,039,156.80
  5. Step 5: Solve for x
    x = 207,039,156.80/15,358.80
  6. Step 6: Final answer
    x = 13,480.16

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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.