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Finding the Fourth Proportional to 20,715.84, 31,046.88 and 9,627.84

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Solution

The fourth proportional to 20,715.84, 31,046.88 and 9,627.84 is: 14,429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.84 : 31,046.88 = 9,627.84 : x
  2. Step 2: Convert to fraction form
    20,715.84/31,046.88 = 9,627.84/x
  3. Step 3: Cross multiply
    20,715.84x = 31,046.88 × 9,627.84
  4. Step 4: Simplify right side
    20,715.84x = 298,914,393.14
  5. Step 5: Solve for x
    x = 298,914,393.14/20,715.84
  6. Step 6: Final answer
    x = 14,429.27

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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.