Home / 20,555.34-30,831.93-5,765.28

Finding the Fourth Proportional to 20,555.34, 30,831.93 and 5,765.28

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Solution

The fourth proportional to 20,555.34, 30,831.93 and 5,765.28 is: 8,647.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.34 : 30,831.93 = 5,765.28 : x
  2. Step 2: Convert to fraction form
    20,555.34/30,831.93 = 5,765.28/x
  3. Step 3: Cross multiply
    20,555.34x = 30,831.93 × 5,765.28
  4. Step 4: Simplify right side
    20,555.34x = 177,754,709.39
  5. Step 5: Solve for x
    x = 177,754,709.39/20,555.34
  6. Step 6: Final answer
    x = 8,647.62

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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.