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Finding the Fourth Proportional to 15,188.84, 20,961.98 and 9,222.02

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Solution

The fourth proportional to 15,188.84, 20,961.98 and 9,222.02 is: 12,727.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,188.84 : 20,961.98 = 9,222.02 : x
  2. Step 2: Convert to fraction form
    15,188.84/20,961.98 = 9,222.02/x
  3. Step 3: Cross multiply
    15,188.84x = 20,961.98 × 9,222.02
  4. Step 4: Simplify right side
    15,188.84x = 193,311,647.88
  5. Step 5: Solve for x
    x = 193,311,647.88/15,188.84
  6. Step 6: Final answer
    x = 12,727.22

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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.