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Finding the Fourth Proportional to 20,707.72, 31,061.58 and 16,081

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Solution

The fourth proportional to 20,707.72, 31,061.58 and 16,081 is: 24,121.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.72 : 31,061.58 = 16,081 : x
  2. Step 2: Convert to fraction form
    20,707.72/31,061.58 = 16,081/x
  3. Step 3: Cross multiply
    20,707.72x = 31,061.58 × 16,081
  4. Step 4: Simplify right side
    20,707.72x = 499,501,267.98
  5. Step 5: Solve for x
    x = 499,501,267.98/20,707.72
  6. Step 6: Final answer
    x = 24,121.50

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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.