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Finding the Fourth Proportional to 9,951.80, 14,909.70 and 7,885.40

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Solution

The fourth proportional to 9,951.80, 14,909.70 and 7,885.40 is: 11,813.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,951.80 : 14,909.70 = 7,885.40 : x
  2. Step 2: Convert to fraction form
    9,951.80/14,909.70 = 7,885.40/x
  3. Step 3: Cross multiply
    9,951.80x = 14,909.70 × 7,885.40
  4. Step 4: Simplify right side
    9,951.80x = 117,568,948.38
  5. Step 5: Solve for x
    x = 117,568,948.38/9,951.80
  6. Step 6: Final answer
    x = 11,813.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.