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Finding the Fourth Proportional to 8,607.41, 11,877.81 and 5,419.79

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Solution

The fourth proportional to 8,607.41, 11,877.81 and 5,419.79 is: 7,479.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.41 : 11,877.81 = 5,419.79 : x
  2. Step 2: Convert to fraction form
    8,607.41/11,877.81 = 5,419.79/x
  3. Step 3: Cross multiply
    8,607.41x = 11,877.81 × 5,419.79
  4. Step 4: Simplify right side
    8,607.41x = 64,375,235.86
  5. Step 5: Solve for x
    x = 64,375,235.86/8,607.41
  6. Step 6: Final answer
    x = 7,479.05

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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.