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Finding the Fourth Proportional to 9,309.40, 13,964.10 and 9,090.70

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Solution

The fourth proportional to 9,309.40, 13,964.10 and 9,090.70 is: 13,636.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,309.40 : 13,964.10 = 9,090.70 : x
  2. Step 2: Convert to fraction form
    9,309.40/13,964.10 = 9,090.70/x
  3. Step 3: Cross multiply
    9,309.40x = 13,964.10 × 9,090.70
  4. Step 4: Simplify right side
    9,309.40x = 126,943,443.87
  5. Step 5: Solve for x
    x = 126,943,443.87/9,309.40
  6. Step 6: Final answer
    x = 13,636.05

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Similar ratio
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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.