Home / 9,405.28-12,979.20-5,213.26

Finding the Fourth Proportional to 9,405.28, 12,979.20 and 5,213.26

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Solution

The fourth proportional to 9,405.28, 12,979.20 and 5,213.26 is: 7,194.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.28 : 12,979.20 = 5,213.26 : x
  2. Step 2: Convert to fraction form
    9,405.28/12,979.20 = 5,213.26/x
  3. Step 3: Cross multiply
    9,405.28x = 12,979.20 × 5,213.26
  4. Step 4: Simplify right side
    9,405.28x = 67,663,944.19
  5. Step 5: Solve for x
    x = 67,663,944.19/9,405.28
  6. Step 6: Final answer
    x = 7,194.25

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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.