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Finding the Fourth Proportional to 19,987.20, 30,007.20 and 16,040.64

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Solution

The fourth proportional to 19,987.20, 30,007.20 and 16,040.64 is: 24,082.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.20 : 30,007.20 = 16,040.64 : x
  2. Step 2: Convert to fraction form
    19,987.20/30,007.20 = 16,040.64/x
  3. Step 3: Cross multiply
    19,987.20x = 30,007.20 × 16,040.64
  4. Step 4: Simplify right side
    19,987.20x = 481,334,692.61
  5. Step 5: Solve for x
    x = 481,334,692.61/19,987.20
  6. Step 6: Final answer
    x = 24,082.15

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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.