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Finding the Fourth Proportional to 20,002.80, 29,989.80 and 11,240.40

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Solution

The fourth proportional to 20,002.80, 29,989.80 and 11,240.40 is: 16,852.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,002.80 : 29,989.80 = 11,240.40 : x
  2. Step 2: Convert to fraction form
    20,002.80/29,989.80 = 11,240.40/x
  3. Step 3: Cross multiply
    20,002.80x = 29,989.80 × 11,240.40
  4. Step 4: Simplify right side
    20,002.80x = 337,097,347.92
  5. Step 5: Solve for x
    x = 337,097,347.92/20,002.80
  6. Step 6: Final answer
    x = 16,852.51

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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.