Home / 8,979.06-12,390.12-5,202.30

Finding the Fourth Proportional to 8,979.06, 12,390.12 and 5,202.30

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Solution

The fourth proportional to 8,979.06, 12,390.12 and 5,202.30 is: 7,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.06 : 12,390.12 = 5,202.30 : x
  2. Step 2: Convert to fraction form
    8,979.06/12,390.12 = 5,202.30/x
  3. Step 3: Cross multiply
    8,979.06x = 12,390.12 × 5,202.30
  4. Step 4: Simplify right side
    8,979.06x = 64,457,121.28
  5. Step 5: Solve for x
    x = 64,457,121.28/8,979.06
  6. Step 6: Final answer
    x = 7,178.60

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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.