Home / 20,724.16-31,086.36-7,571.10

Finding the Fourth Proportional to 20,724.16, 31,086.36 and 7,571.10

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Solution

The fourth proportional to 20,724.16, 31,086.36 and 7,571.10 is: 11,356.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.16 : 31,086.36 = 7,571.10 : x
  2. Step 2: Convert to fraction form
    20,724.16/31,086.36 = 7,571.10/x
  3. Step 3: Cross multiply
    20,724.16x = 31,086.36 × 7,571.10
  4. Step 4: Simplify right side
    20,724.16x = 235,357,940.20
  5. Step 5: Solve for x
    x = 235,357,940.20/20,724.16
  6. Step 6: Final answer
    x = 11,356.69

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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.