Home / 7,085.77-9,777.75-4,101.78

Finding the Fourth Proportional to 7,085.77, 9,777.75 and 4,101.78

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Solution

The fourth proportional to 7,085.77, 9,777.75 and 4,101.78 is: 5,660.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.77 : 9,777.75 = 4,101.78 : x
  2. Step 2: Convert to fraction form
    7,085.77/9,777.75 = 4,101.78/x
  3. Step 3: Cross multiply
    7,085.77x = 9,777.75 × 4,101.78
  4. Step 4: Simplify right side
    7,085.77x = 40,106,179.40
  5. Step 5: Solve for x
    x = 40,106,179.40/7,085.77
  6. Step 6: Final answer
    x = 5,660.10

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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.