Home / 11,172.84-15,391.92-7,809.41

Finding the Fourth Proportional to 11,172.84, 15,391.92 and 7,809.41

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Solution

The fourth proportional to 11,172.84, 15,391.92 and 7,809.41 is: 10,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.84 : 15,391.92 = 7,809.41 : x
  2. Step 2: Convert to fraction form
    11,172.84/15,391.92 = 7,809.41/x
  3. Step 3: Cross multiply
    11,172.84x = 15,391.92 × 7,809.41
  4. Step 4: Simplify right side
    11,172.84x = 120,201,881.73
  5. Step 5: Solve for x
    x = 120,201,881.73/11,172.84
  6. Step 6: Final answer
    x = 10,758.40

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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.