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Finding the Fourth Proportional to 11,661.70, 17,492.55 and 9,912.10

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Solution

The fourth proportional to 11,661.70, 17,492.55 and 9,912.10 is: 14,868.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,661.70 : 17,492.55 = 9,912.10 : x
  2. Step 2: Convert to fraction form
    11,661.70/17,492.55 = 9,912.10/x
  3. Step 3: Cross multiply
    11,661.70x = 17,492.55 × 9,912.10
  4. Step 4: Simplify right side
    11,661.70x = 173,387,904.86
  5. Step 5: Solve for x
    x = 173,387,904.86/11,661.70
  6. Step 6: Final answer
    x = 14,868.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.