Home / 8,979.13-12,378.36-6,318.28

Finding the Fourth Proportional to 8,979.13, 12,378.36 and 6,318.28

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Solution

The fourth proportional to 8,979.13, 12,378.36 and 6,318.28 is: 8,710.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.13 : 12,378.36 = 6,318.28 : x
  2. Step 2: Convert to fraction form
    8,979.13/12,378.36 = 6,318.28/x
  3. Step 3: Cross multiply
    8,979.13x = 12,378.36 × 6,318.28
  4. Step 4: Simplify right side
    8,979.13x = 78,209,944.42
  5. Step 5: Solve for x
    x = 78,209,944.42/8,979.13
  6. Step 6: Final answer
    x = 8,710.19

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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.