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Finding the Fourth Proportional to 8,859.38, 12,218.63 and 5,320.08

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Solution

The fourth proportional to 8,859.38, 12,218.63 and 5,320.08 is: 7,337.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,859.38 : 12,218.63 = 5,320.08 : x
  2. Step 2: Convert to fraction form
    8,859.38/12,218.63 = 5,320.08/x
  3. Step 3: Cross multiply
    8,859.38x = 12,218.63 × 5,320.08
  4. Step 4: Simplify right side
    8,859.38x = 65,004,062.49
  5. Step 5: Solve for x
    x = 65,004,062.49/8,859.38
  6. Step 6: Final answer
    x = 7,337.32

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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.