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Finding the Fourth Proportional to 7,238.19, 9,988.70 and 3,926.19

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Solution

The fourth proportional to 7,238.19, 9,988.70 and 3,926.19 is: 5,418.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,238.19 : 9,988.70 = 3,926.19 : x
  2. Step 2: Convert to fraction form
    7,238.19/9,988.70 = 3,926.19/x
  3. Step 3: Cross multiply
    7,238.19x = 9,988.70 × 3,926.19
  4. Step 4: Simplify right side
    7,238.19x = 39,217,534.05
  5. Step 5: Solve for x
    x = 39,217,534.05/7,238.19
  6. Step 6: Final answer
    x = 5,418.14

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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.