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Finding the Fourth Proportional to 22,440.80, 33,661.20 and 21,420.20

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Solution

The fourth proportional to 22,440.80, 33,661.20 and 21,420.20 is: 32,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,440.80 : 33,661.20 = 21,420.20 : x
  2. Step 2: Convert to fraction form
    22,440.80/33,661.20 = 21,420.20/x
  3. Step 3: Cross multiply
    22,440.80x = 33,661.20 × 21,420.20
  4. Step 4: Simplify right side
    22,440.80x = 721,029,636.24
  5. Step 5: Solve for x
    x = 721,029,636.24/22,440.80
  6. Step 6: Final answer
    x = 32,130.30

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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.