Home / 15,378.66-21,222.54-8,665.92

Finding the Fourth Proportional to 15,378.66, 21,222.54 and 8,665.92

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Solution

The fourth proportional to 15,378.66, 21,222.54 and 8,665.92 is: 11,958.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.66 : 21,222.54 = 8,665.92 : x
  2. Step 2: Convert to fraction form
    15,378.66/21,222.54 = 8,665.92/x
  3. Step 3: Cross multiply
    15,378.66x = 21,222.54 × 8,665.92
  4. Step 4: Simplify right side
    15,378.66x = 183,912,833.84
  5. Step 5: Solve for x
    x = 183,912,833.84/15,378.66
  6. Step 6: Final answer
    x = 11,958.96

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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.