Home / 15,393.28-21,238.80-9,422.80

Finding the Fourth Proportional to 15,393.28, 21,238.80 and 9,422.80

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Solution

The fourth proportional to 15,393.28, 21,238.80 and 9,422.80 is: 13,001.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,393.28 : 21,238.80 = 9,422.80 : x
  2. Step 2: Convert to fraction form
    15,393.28/21,238.80 = 9,422.80/x
  3. Step 3: Cross multiply
    15,393.28x = 21,238.80 × 9,422.80
  4. Step 4: Simplify right side
    15,393.28x = 200,128,964.64
  5. Step 5: Solve for x
    x = 200,128,964.64/15,393.28
  6. Step 6: Final answer
    x = 13,001.06

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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.