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Finding the Fourth Proportional to 15,909.46, 21,955.47 and 8,836.54

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Solution

The fourth proportional to 15,909.46, 21,955.47 and 8,836.54 is: 12,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.46 : 21,955.47 = 8,836.54 : x
  2. Step 2: Convert to fraction form
    15,909.46/21,955.47 = 8,836.54/x
  3. Step 3: Cross multiply
    15,909.46x = 21,955.47 × 8,836.54
  4. Step 4: Simplify right side
    15,909.46x = 194,010,388.87
  5. Step 5: Solve for x
    x = 194,010,388.87/15,909.46
  6. Step 6: Final answer
    x = 12,194.66

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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.