Home / 8,919.16-12,305.22-5,381.08

Finding the Fourth Proportional to 8,919.16, 12,305.22 and 5,381.08

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Solution

The fourth proportional to 8,919.16, 12,305.22 and 5,381.08 is: 7,423.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.16 : 12,305.22 = 5,381.08 : x
  2. Step 2: Convert to fraction form
    8,919.16/12,305.22 = 5,381.08/x
  3. Step 3: Cross multiply
    8,919.16x = 12,305.22 × 5,381.08
  4. Step 4: Simplify right side
    8,919.16x = 66,215,373.24
  5. Step 5: Solve for x
    x = 66,215,373.24/8,919.16
  6. Step 6: Final answer
    x = 7,423.95

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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.