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Finding the Fourth Proportional to 21,937.80, 32,909.40 and 7,895.64

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Solution

The fourth proportional to 21,937.80, 32,909.40 and 7,895.64 is: 11,844.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937.80 : 32,909.40 = 7,895.64 : x
  2. Step 2: Convert to fraction form
    21,937.80/32,909.40 = 7,895.64/x
  3. Step 3: Cross multiply
    21,937.80x = 32,909.40 × 7,895.64
  4. Step 4: Simplify right side
    21,937.80x = 259,840,775.02
  5. Step 5: Solve for x
    x = 259,840,775.02/21,937.80
  6. Step 6: Final answer
    x = 11,844.43

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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.