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Finding the Fourth Proportional to 20,081.84, 30,113.40 and 10,719.32

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Solution

The fourth proportional to 20,081.84, 30,113.40 and 10,719.32 is: 16,073.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.84 : 30,113.40 = 10,719.32 : x
  2. Step 2: Convert to fraction form
    20,081.84/30,113.40 = 10,719.32/x
  3. Step 3: Cross multiply
    20,081.84x = 30,113.40 × 10,719.32
  4. Step 4: Simplify right side
    20,081.84x = 322,795,170.89
  5. Step 5: Solve for x
    x = 322,795,170.89/20,081.84
  6. Step 6: Final answer
    x = 16,073.98

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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.