Home / 7,091.95-9,786.80-3,905.18

Finding the Fourth Proportional to 7,091.95, 9,786.80 and 3,905.18

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Solution

The fourth proportional to 7,091.95, 9,786.80 and 3,905.18 is: 5,389.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,091.95 : 9,786.80 = 3,905.18 : x
  2. Step 2: Convert to fraction form
    7,091.95/9,786.80 = 3,905.18/x
  3. Step 3: Cross multiply
    7,091.95x = 9,786.80 × 3,905.18
  4. Step 4: Simplify right side
    7,091.95x = 38,219,176.45
  5. Step 5: Solve for x
    x = 38,219,176.45/7,091.95
  6. Step 6: Final answer
    x = 5,389.10

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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.