Home / 7,091.96-9,787.15-3,905.59

Finding the Fourth Proportional to 7,091.96, 9,787.15 and 3,905.59

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Solution

The fourth proportional to 7,091.96, 9,787.15 and 3,905.59 is: 5,389.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,091.96 : 9,787.15 = 3,905.59 : x
  2. Step 2: Convert to fraction form
    7,091.96/9,787.15 = 3,905.59/x
  3. Step 3: Cross multiply
    7,091.96x = 9,787.15 × 3,905.59
  4. Step 4: Simplify right side
    7,091.96x = 38,224,597.64
  5. Step 5: Solve for x
    x = 38,224,597.64/7,091.96
  6. Step 6: Final answer
    x = 5,389.85

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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.