Home / 7,812.72-11,719.02-2,618.56

Finding the Fourth Proportional to 7,812.72, 11,719.02 and 2,618.56

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Solution

The fourth proportional to 7,812.72, 11,719.02 and 2,618.56 is: 3,927.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,812.72 : 11,719.02 = 2,618.56 : x
  2. Step 2: Convert to fraction form
    7,812.72/11,719.02 = 2,618.56/x
  3. Step 3: Cross multiply
    7,812.72x = 11,719.02 × 2,618.56
  4. Step 4: Simplify right side
    7,812.72x = 30,686,957.01
  5. Step 5: Solve for x
    x = 30,686,957.01/7,812.72
  6. Step 6: Final answer
    x = 3,927.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.