Home / 7,319.60-10,979.40-6,887.60

Finding the Fourth Proportional to 7,319.60, 10,979.40 and 6,887.60

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Solution

The fourth proportional to 7,319.60, 10,979.40 and 6,887.60 is: 10,331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319.60 : 10,979.40 = 6,887.60 : x
  2. Step 2: Convert to fraction form
    7,319.60/10,979.40 = 6,887.60/x
  3. Step 3: Cross multiply
    7,319.60x = 10,979.40 × 6,887.60
  4. Step 4: Simplify right side
    7,319.60x = 75,621,715.44
  5. Step 5: Solve for x
    x = 75,621,715.44/7,319.60
  6. Step 6: Final answer
    x = 10,331.40

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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.