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Finding the Fourth Proportional to 15,882.55, 21,912.93 and 9,167.31

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Solution

The fourth proportional to 15,882.55, 21,912.93 and 9,167.31 is: 12,648.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.55 : 21,912.93 = 9,167.31 : x
  2. Step 2: Convert to fraction form
    15,882.55/21,912.93 = 9,167.31/x
  3. Step 3: Cross multiply
    15,882.55x = 21,912.93 × 9,167.31
  4. Step 4: Simplify right side
    15,882.55x = 200,882,622.32
  5. Step 5: Solve for x
    x = 200,882,622.32/15,882.55
  6. Step 6: Final answer
    x = 12,648.01

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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.