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Finding the Fourth Proportional to 21,988.41, 32,964.12 and 7,189.26

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Solution

The fourth proportional to 21,988.41, 32,964.12 and 7,189.26 is: 10,777.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.41 : 32,964.12 = 7,189.26 : x
  2. Step 2: Convert to fraction form
    21,988.41/32,964.12 = 7,189.26/x
  3. Step 3: Cross multiply
    21,988.41x = 32,964.12 × 7,189.26
  4. Step 4: Simplify right side
    21,988.41x = 236,987,629.35
  5. Step 5: Solve for x
    x = 236,987,629.35/21,988.41
  6. Step 6: Final answer
    x = 10,777.84

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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.