Home / 15,357.80-21,197.40-9,765.56

Finding the Fourth Proportional to 15,357.80, 21,197.40 and 9,765.56

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Solution

The fourth proportional to 15,357.80, 21,197.40 and 9,765.56 is: 13,478.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.80 : 21,197.40 = 9,765.56 : x
  2. Step 2: Convert to fraction form
    15,357.80/21,197.40 = 9,765.56/x
  3. Step 3: Cross multiply
    15,357.80x = 21,197.40 × 9,765.56
  4. Step 4: Simplify right side
    15,357.80x = 207,004,497.92
  5. Step 5: Solve for x
    x = 207,004,497.92/15,357.80
  6. Step 6: Final answer
    x = 13,478.78

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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.