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Finding the Fourth Proportional to 15,871.67, 21,902.91 and 8,797.94

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Solution

The fourth proportional to 15,871.67, 21,902.91 and 8,797.94 is: 12,141.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.67 : 21,902.91 = 8,797.94 : x
  2. Step 2: Convert to fraction form
    15,871.67/21,902.91 = 8,797.94/x
  3. Step 3: Cross multiply
    15,871.67x = 21,902.91 × 8,797.94
  4. Step 4: Simplify right side
    15,871.67x = 192,700,488.01
  5. Step 5: Solve for x
    x = 192,700,488.01/15,871.67
  6. Step 6: Final answer
    x = 12,141.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.