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Finding the Fourth Proportional to 8,939.79, 13,440.06 and 7,308.18

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Solution

The fourth proportional to 8,939.79, 13,440.06 and 7,308.18 is: 10,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.79 : 13,440.06 = 7,308.18 : x
  2. Step 2: Convert to fraction form
    8,939.79/13,440.06 = 7,308.18/x
  3. Step 3: Cross multiply
    8,939.79x = 13,440.06 × 7,308.18
  4. Step 4: Simplify right side
    8,939.79x = 98,222,377.69
  5. Step 5: Solve for x
    x = 98,222,377.69/8,939.79
  6. Step 6: Final answer
    x = 10,987.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.