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Finding the Fourth Proportional to 7,209.39, 9,948.93 and 3,897.39

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Solution

The fourth proportional to 7,209.39, 9,948.93 and 3,897.39 is: 5,378.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.39 : 9,948.93 = 3,897.39 : x
  2. Step 2: Convert to fraction form
    7,209.39/9,948.93 = 3,897.39/x
  3. Step 3: Cross multiply
    7,209.39x = 9,948.93 × 3,897.39
  4. Step 4: Simplify right side
    7,209.39x = 38,774,860.29
  5. Step 5: Solve for x
    x = 38,774,860.29/7,209.39
  6. Step 6: Final answer
    x = 5,378.38

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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.