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Finding the Fourth Proportional to 12,339.40, 17,022.18 and 7,301.20

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Solution

The fourth proportional to 12,339.40, 17,022.18 and 7,301.20 is: 10,071.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,339.40 : 17,022.18 = 7,301.20 : x
  2. Step 2: Convert to fraction form
    12,339.40/17,022.18 = 7,301.20/x
  3. Step 3: Cross multiply
    12,339.40x = 17,022.18 × 7,301.20
  4. Step 4: Simplify right side
    12,339.40x = 124,282,340.62
  5. Step 5: Solve for x
    x = 124,282,340.62/12,339.40
  6. Step 6: Final answer
    x = 10,071.99

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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.