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Finding the Fourth Proportional to 7,938.61, 11,907.07 and 3,259.11

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Solution

The fourth proportional to 7,938.61, 11,907.07 and 3,259.11 is: 4,888.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,938.61 : 11,907.07 = 3,259.11 : x
  2. Step 2: Convert to fraction form
    7,938.61/11,907.07 = 3,259.11/x
  3. Step 3: Cross multiply
    7,938.61x = 11,907.07 × 3,259.11
  4. Step 4: Simplify right side
    7,938.61x = 38,806,450.91
  5. Step 5: Solve for x
    x = 38,806,450.91/7,938.61
  6. Step 6: Final answer
    x = 4,888.32

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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.