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Finding the Fourth Proportional to 20,015.40, 29,979.90 and 16,559.40

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Solution

The fourth proportional to 20,015.40, 29,979.90 and 16,559.40 is: 24,803.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.40 : 29,979.90 = 16,559.40 : x
  2. Step 2: Convert to fraction form
    20,015.40/29,979.90 = 16,559.40/x
  3. Step 3: Cross multiply
    20,015.40x = 29,979.90 × 16,559.40
  4. Step 4: Simplify right side
    20,015.40x = 496,449,156.06
  5. Step 5: Solve for x
    x = 496,449,156.06/20,015.40
  6. Step 6: Final answer
    x = 24,803.36

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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.