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Finding the Fourth Proportional to 12,607.88, 17,392.02 and 7,891.16

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Solution

The fourth proportional to 12,607.88, 17,392.02 and 7,891.16 is: 10,885.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,607.88 : 17,392.02 = 7,891.16 : x
  2. Step 2: Convert to fraction form
    12,607.88/17,392.02 = 7,891.16/x
  3. Step 3: Cross multiply
    12,607.88x = 17,392.02 × 7,891.16
  4. Step 4: Simplify right side
    12,607.88x = 137,243,212.54
  5. Step 5: Solve for x
    x = 137,243,212.54/12,607.88
  6. Step 6: Final answer
    x = 10,885.51

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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.