Home / 21,219.75-31,831.65-8,740.62

Finding the Fourth Proportional to 21,219.75, 31,831.65 and 8,740.62

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Solution

The fourth proportional to 21,219.75, 31,831.65 and 8,740.62 is: 13,111.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.75 : 31,831.65 = 8,740.62 : x
  2. Step 2: Convert to fraction form
    21,219.75/31,831.65 = 8,740.62/x
  3. Step 3: Cross multiply
    21,219.75x = 31,831.65 × 8,740.62
  4. Step 4: Simplify right side
    21,219.75x = 278,228,356.62
  5. Step 5: Solve for x
    x = 278,228,356.62/21,219.75
  6. Step 6: Final answer
    x = 13,111.76

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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.