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Finding the Fourth Proportional to 21,760.55, 32,655.41 and 7,909.55

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Solution

The fourth proportional to 21,760.55, 32,655.41 and 7,909.55 is: 11,869.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,760.55 : 32,655.41 = 7,909.55 : x
  2. Step 2: Convert to fraction form
    21,760.55/32,655.41 = 7,909.55/x
  3. Step 3: Cross multiply
    21,760.55x = 32,655.41 × 7,909.55
  4. Step 4: Simplify right side
    21,760.55x = 258,289,395.34
  5. Step 5: Solve for x
    x = 258,289,395.34/21,760.55
  6. Step 6: Final answer
    x = 11,869.62

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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.