Home / 11,155.84-15,391.96-7,970.11

Finding the Fourth Proportional to 11,155.84, 15,391.96 and 7,970.11

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Solution

The fourth proportional to 11,155.84, 15,391.96 and 7,970.11 is: 10,996.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.84 : 15,391.96 = 7,970.11 : x
  2. Step 2: Convert to fraction form
    11,155.84/15,391.96 = 7,970.11/x
  3. Step 3: Cross multiply
    11,155.84x = 15,391.96 × 7,970.11
  4. Step 4: Simplify right side
    11,155.84x = 122,675,555.91
  5. Step 5: Solve for x
    x = 122,675,555.91/11,155.84
  6. Step 6: Final answer
    x = 10,996.53

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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.