Home / 8,919.83-12,305.50-5,381.07

Finding the Fourth Proportional to 8,919.83, 12,305.50 and 5,381.07

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Solution

The fourth proportional to 8,919.83, 12,305.50 and 5,381.07 is: 7,423.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.83 : 12,305.50 = 5,381.07 : x
  2. Step 2: Convert to fraction form
    8,919.83/12,305.50 = 5,381.07/x
  3. Step 3: Cross multiply
    8,919.83x = 12,305.50 × 5,381.07
  4. Step 4: Simplify right side
    8,919.83x = 66,216,743.43
  5. Step 5: Solve for x
    x = 66,216,743.43/8,919.83
  6. Step 6: Final answer
    x = 7,423.55

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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.