Home / 10,979.70-16,480.35-5,439.30

Finding the Fourth Proportional to 10,979.70, 16,480.35 and 5,439.30

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Solution

The fourth proportional to 10,979.70, 16,480.35 and 5,439.30 is: 8,164.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.70 : 16,480.35 = 5,439.30 : x
  2. Step 2: Convert to fraction form
    10,979.70/16,480.35 = 5,439.30/x
  3. Step 3: Cross multiply
    10,979.70x = 16,480.35 × 5,439.30
  4. Step 4: Simplify right side
    10,979.70x = 89,641,567.76
  5. Step 5: Solve for x
    x = 89,641,567.76/10,979.70
  6. Step 6: Final answer
    x = 8,164.30

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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.