Home / 15,320.80-21,147.78-9,656.20

Finding the Fourth Proportional to 15,320.80, 21,147.78 and 9,656.20

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Solution

The fourth proportional to 15,320.80, 21,147.78 and 9,656.20 is: 13,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.80 : 21,147.78 = 9,656.20 : x
  2. Step 2: Convert to fraction form
    15,320.80/21,147.78 = 9,656.20/x
  3. Step 3: Cross multiply
    15,320.80x = 21,147.78 × 9,656.20
  4. Step 4: Simplify right side
    15,320.80x = 204,207,193.24
  5. Step 5: Solve for x
    x = 204,207,193.24/15,320.80
  6. Step 6: Final answer
    x = 13,328.76

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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.