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Finding the Fourth Proportional to 21,813.83, 32,704.84 and 9,961.20

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Solution

The fourth proportional to 21,813.83, 32,704.84 and 9,961.20 is: 14,934.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.83 : 32,704.84 = 9,961.20 : x
  2. Step 2: Convert to fraction form
    21,813.83/32,704.84 = 9,961.20/x
  3. Step 3: Cross multiply
    21,813.83x = 32,704.84 × 9,961.20
  4. Step 4: Simplify right side
    21,813.83x = 325,779,452.21
  5. Step 5: Solve for x
    x = 325,779,452.21/21,813.83
  6. Step 6: Final answer
    x = 14,934.54

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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.