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Finding the Fourth Proportional to 9,212.88, 12,713.86 and 5,021.22

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Solution

The fourth proportional to 9,212.88, 12,713.86 and 5,021.22 is: 6,929.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,212.88 : 12,713.86 = 5,021.22 : x
  2. Step 2: Convert to fraction form
    9,212.88/12,713.86 = 5,021.22/x
  3. Step 3: Cross multiply
    9,212.88x = 12,713.86 × 5,021.22
  4. Step 4: Simplify right side
    9,212.88x = 63,839,088.11
  5. Step 5: Solve for x
    x = 63,839,088.11/9,212.88
  6. Step 6: Final answer
    x = 6,929.33

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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.