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Finding the Fourth Proportional to 12,990, 17,927.96 and 7,325.91

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Solution

The fourth proportional to 12,990, 17,927.96 and 7,325.91 is: 10,110.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990 : 17,927.96 = 7,325.91 : x
  2. Step 2: Convert to fraction form
    12,990/17,927.96 = 7,325.91/x
  3. Step 3: Cross multiply
    12,990x = 17,927.96 × 7,325.91
  4. Step 4: Simplify right side
    12,990x = 131,338,584.81
  5. Step 5: Solve for x
    x = 131,338,584.81/12,990
  6. Step 6: Final answer
    x = 10,110.75

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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.