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Finding the Fourth Proportional to 21,468.52, 32,190.90 and 7,420.96

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Solution

The fourth proportional to 21,468.52, 32,190.90 and 7,420.96 is: 11,127.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,468.52 : 32,190.90 = 7,420.96 : x
  2. Step 2: Convert to fraction form
    21,468.52/32,190.90 = 7,420.96/x
  3. Step 3: Cross multiply
    21,468.52x = 32,190.90 × 7,420.96
  4. Step 4: Simplify right side
    21,468.52x = 238,887,381.26
  5. Step 5: Solve for x
    x = 238,887,381.26/21,468.52
  6. Step 6: Final answer
    x = 11,127.33

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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.