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Finding the Fourth Proportional to 20,007.20, 30,010.80 and 17,760.80

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Solution

The fourth proportional to 20,007.20, 30,010.80 and 17,760.80 is: 26,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,007.20 : 30,010.80 = 17,760.80 : x
  2. Step 2: Convert to fraction form
    20,007.20/30,010.80 = 17,760.80/x
  3. Step 3: Cross multiply
    20,007.20x = 30,010.80 × 17,760.80
  4. Step 4: Simplify right side
    20,007.20x = 533,015,816.64
  5. Step 5: Solve for x
    x = 533,015,816.64/20,007.20
  6. Step 6: Final answer
    x = 26,641.20

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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.