Home / 7,085.20-9,777.90-4,101.76

Finding the Fourth Proportional to 7,085.20, 9,777.90 and 4,101.76

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Solution

The fourth proportional to 7,085.20, 9,777.90 and 4,101.76 is: 5,660.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.20 : 9,777.90 = 4,101.76 : x
  2. Step 2: Convert to fraction form
    7,085.20/9,777.90 = 4,101.76/x
  3. Step 3: Cross multiply
    7,085.20x = 9,777.90 × 4,101.76
  4. Step 4: Simplify right side
    7,085.20x = 40,106,599.10
  5. Step 5: Solve for x
    x = 40,106,599.10/7,085.20
  6. Step 6: Final answer
    x = 5,660.62

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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.