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Finding the Fourth Proportional to 7,099.38, 10,649.03 and 3,979.40

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Solution

The fourth proportional to 7,099.38, 10,649.03 and 3,979.40 is: 5,969.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,099.38 : 10,649.03 = 3,979.40 : x
  2. Step 2: Convert to fraction form
    7,099.38/10,649.03 = 3,979.40/x
  3. Step 3: Cross multiply
    7,099.38x = 10,649.03 × 3,979.40
  4. Step 4: Simplify right side
    7,099.38x = 42,376,749.98
  5. Step 5: Solve for x
    x = 42,376,749.98/7,099.38
  6. Step 6: Final answer
    x = 5,969.08

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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.