Home / 21,226.86-31,831.56-9,219.78

Finding the Fourth Proportional to 21,226.86, 31,831.56 and 9,219.78

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Solution

The fourth proportional to 21,226.86, 31,831.56 and 9,219.78 is: 13,825.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,226.86 : 31,831.56 = 9,219.78 : x
  2. Step 2: Convert to fraction form
    21,226.86/31,831.56 = 9,219.78/x
  3. Step 3: Cross multiply
    21,226.86x = 31,831.56 × 9,219.78
  4. Step 4: Simplify right side
    21,226.86x = 293,479,980.26
  5. Step 5: Solve for x
    x = 293,479,980.26/21,226.86
  6. Step 6: Final answer
    x = 13,825.88

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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.