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Finding the Fourth Proportional to 12,394.21, 17,102.96 and 7,087.99

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Solution

The fourth proportional to 12,394.21, 17,102.96 and 7,087.99 is: 9,780.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,394.21 : 17,102.96 = 7,087.99 : x
  2. Step 2: Convert to fraction form
    12,394.21/17,102.96 = 7,087.99/x
  3. Step 3: Cross multiply
    12,394.21x = 17,102.96 × 7,087.99
  4. Step 4: Simplify right side
    12,394.21x = 121,225,574.01
  5. Step 5: Solve for x
    x = 121,225,574.01/12,394.21
  6. Step 6: Final answer
    x = 9,780.82

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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.