Home / 8,979.12-12,389.28-5,202.08

Finding the Fourth Proportional to 8,979.12, 12,389.28 and 5,202.08

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Solution

The fourth proportional to 8,979.12, 12,389.28 and 5,202.08 is: 7,177.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.12 : 12,389.28 = 5,202.08 : x
  2. Step 2: Convert to fraction form
    8,979.12/12,389.28 = 5,202.08/x
  3. Step 3: Cross multiply
    8,979.12x = 12,389.28 × 5,202.08
  4. Step 4: Simplify right side
    8,979.12x = 64,450,025.70
  5. Step 5: Solve for x
    x = 64,450,025.70/8,979.12
  6. Step 6: Final answer
    x = 7,177.77

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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.