Home / 15,231.38-21,021.12-8,943.75

Finding the Fourth Proportional to 15,231.38, 21,021.12 and 8,943.75

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Solution

The fourth proportional to 15,231.38, 21,021.12 and 8,943.75 is: 12,343.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.38 : 21,021.12 = 8,943.75 : x
  2. Step 2: Convert to fraction form
    15,231.38/21,021.12 = 8,943.75/x
  3. Step 3: Cross multiply
    15,231.38x = 21,021.12 × 8,943.75
  4. Step 4: Simplify right side
    15,231.38x = 188,007,642
  5. Step 5: Solve for x
    x = 188,007,642/15,231.38
  6. Step 6: Final answer
    x = 12,343.45

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Double scale
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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.