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Finding the Fourth Proportional to 12,551.97, 18,803.55 and 6,988.47

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Solution

The fourth proportional to 12,551.97, 18,803.55 and 6,988.47 is: 10,469.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,551.97 : 18,803.55 = 6,988.47 : x
  2. Step 2: Convert to fraction form
    12,551.97/18,803.55 = 6,988.47/x
  3. Step 3: Cross multiply
    12,551.97x = 18,803.55 × 6,988.47
  4. Step 4: Simplify right side
    12,551.97x = 131,408,045.07
  5. Step 5: Solve for x
    x = 131,408,045.07/12,551.97
  6. Step 6: Final answer
    x = 10,469.12

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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.