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Finding the Fourth Proportional to 21,404.80, 32,107.20 and 19,108.45

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Solution

The fourth proportional to 21,404.80, 32,107.20 and 19,108.45 is: 28,662.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,404.80 : 32,107.20 = 19,108.45 : x
  2. Step 2: Convert to fraction form
    21,404.80/32,107.20 = 19,108.45/x
  3. Step 3: Cross multiply
    21,404.80x = 32,107.20 × 19,108.45
  4. Step 4: Simplify right side
    21,404.80x = 613,518,825.84
  5. Step 5: Solve for x
    x = 613,518,825.84/21,404.80
  6. Step 6: Final answer
    x = 28,662.68

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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.