Home / 15,871.25-21,902.33-8,798.75

Finding the Fourth Proportional to 15,871.25, 21,902.33 and 8,798.75

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Solution

The fourth proportional to 15,871.25, 21,902.33 and 8,798.75 is: 12,142.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.25 : 21,902.33 = 8,798.75 : x
  2. Step 2: Convert to fraction form
    15,871.25/21,902.33 = 8,798.75/x
  3. Step 3: Cross multiply
    15,871.25x = 21,902.33 × 8,798.75
  4. Step 4: Simplify right side
    15,871.25x = 192,713,082.09
  5. Step 5: Solve for x
    x = 192,713,082.09/15,871.25
  6. Step 6: Final answer
    x = 12,142.28

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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.