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Finding the Fourth Proportional to 9,861.40, 13,603.62 and 6,674.80

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Solution

The fourth proportional to 9,861.40, 13,603.62 and 6,674.80 is: 9,207.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,861.40 : 13,603.62 = 6,674.80 : x
  2. Step 2: Convert to fraction form
    9,861.40/13,603.62 = 6,674.80/x
  3. Step 3: Cross multiply
    9,861.40x = 13,603.62 × 6,674.80
  4. Step 4: Simplify right side
    9,861.40x = 90,801,442.78
  5. Step 5: Solve for x
    x = 90,801,442.78/9,861.40
  6. Step 6: Final answer
    x = 9,207.76

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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.