Home / 20,724.54-31,086.81-5,142.17

Finding the Fourth Proportional to 20,724.54, 31,086.81 and 5,142.17

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Solution

The fourth proportional to 20,724.54, 31,086.81 and 5,142.17 is: 7,713.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.54 : 31,086.81 = 5,142.17 : x
  2. Step 2: Convert to fraction form
    20,724.54/31,086.81 = 5,142.17/x
  3. Step 3: Cross multiply
    20,724.54x = 31,086.81 × 5,142.17
  4. Step 4: Simplify right side
    20,724.54x = 159,853,506.34
  5. Step 5: Solve for x
    x = 159,853,506.34/20,724.54
  6. Step 6: Final answer
    x = 7,713.25

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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.