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Finding the Fourth Proportional to 12,326.28, 17,008.28 and 7,021.20

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Solution

The fourth proportional to 12,326.28, 17,008.28 and 7,021.20 is: 9,688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,326.28 : 17,008.28 = 7,021.20 : x
  2. Step 2: Convert to fraction form
    12,326.28/17,008.28 = 7,021.20/x
  3. Step 3: Cross multiply
    12,326.28x = 17,008.28 × 7,021.20
  4. Step 4: Simplify right side
    12,326.28x = 119,418,535.54
  5. Step 5: Solve for x
    x = 119,418,535.54/12,326.28
  6. Step 6: Final answer
    x = 9,688.12

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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.