Home / 7,111.28-9,815.62-4,127.78

Finding the Fourth Proportional to 7,111.28, 9,815.62 and 4,127.78

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Solution

The fourth proportional to 7,111.28, 9,815.62 and 4,127.78 is: 5,697.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.28 : 9,815.62 = 4,127.78 : x
  2. Step 2: Convert to fraction form
    7,111.28/9,815.62 = 4,127.78/x
  3. Step 3: Cross multiply
    7,111.28x = 9,815.62 × 4,127.78
  4. Step 4: Simplify right side
    7,111.28x = 40,516,719.92
  5. Step 5: Solve for x
    x = 40,516,719.92/7,111.28
  6. Step 6: Final answer
    x = 5,697.53

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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.