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Finding the Fourth Proportional to 6,909.56, 10,365.72 and 1,979.22

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Solution

The fourth proportional to 6,909.56, 10,365.72 and 1,979.22 is: 2,969.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,909.56 : 10,365.72 = 1,979.22 : x
  2. Step 2: Convert to fraction form
    6,909.56/10,365.72 = 1,979.22/x
  3. Step 3: Cross multiply
    6,909.56x = 10,365.72 × 1,979.22
  4. Step 4: Simplify right side
    6,909.56x = 20,516,040.34
  5. Step 5: Solve for x
    x = 20,516,040.34/6,909.56
  6. Step 6: Final answer
    x = 2,969.23

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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.