Home / 15,330.80-21,147.84-9,655.79

Finding the Fourth Proportional to 15,330.80, 21,147.84 and 9,655.79

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Solution

The fourth proportional to 15,330.80, 21,147.84 and 9,655.79 is: 13,319.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.80 : 21,147.84 = 9,655.79 : x
  2. Step 2: Convert to fraction form
    15,330.80/21,147.84 = 9,655.79/x
  3. Step 3: Cross multiply
    15,330.80x = 21,147.84 × 9,655.79
  4. Step 4: Simplify right side
    15,330.80x = 204,198,996.25
  5. Step 5: Solve for x
    x = 204,198,996.25/15,330.80
  6. Step 6: Final answer
    x = 13,319.53

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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.