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Finding the Fourth Proportional to 8,603.40, 11,872.80 and 5,066.40

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Solution

The fourth proportional to 8,603.40, 11,872.80 and 5,066.40 is: 6,991.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.40 : 11,872.80 = 5,066.40 : x
  2. Step 2: Convert to fraction form
    8,603.40/11,872.80 = 5,066.40/x
  3. Step 3: Cross multiply
    8,603.40x = 11,872.80 × 5,066.40
  4. Step 4: Simplify right side
    8,603.40x = 60,152,353.92
  5. Step 5: Solve for x
    x = 60,152,353.92/8,603.40
  6. Step 6: Final answer
    x = 6,991.70

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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.