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Finding the Fourth Proportional to 11,281.80, 16,884.30 and 9,899.40

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Solution

The fourth proportional to 11,281.80, 16,884.30 and 9,899.40 is: 14,815.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,281.80 : 16,884.30 = 9,899.40 : x
  2. Step 2: Convert to fraction form
    11,281.80/16,884.30 = 9,899.40/x
  3. Step 3: Cross multiply
    11,281.80x = 16,884.30 × 9,899.40
  4. Step 4: Simplify right side
    11,281.80x = 167,144,439.42
  5. Step 5: Solve for x
    x = 167,144,439.42/11,281.80
  6. Step 6: Final answer
    x = 14,815.41

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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.