Home / 20,831.45-31,248.59-7,684.74

Finding the Fourth Proportional to 20,831.45, 31,248.59 and 7,684.74

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Solution

The fourth proportional to 20,831.45, 31,248.59 and 7,684.74 is: 11,527.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.45 : 31,248.59 = 7,684.74 : x
  2. Step 2: Convert to fraction form
    20,831.45/31,248.59 = 7,684.74/x
  3. Step 3: Cross multiply
    20,831.45x = 31,248.59 × 7,684.74
  4. Step 4: Simplify right side
    20,831.45x = 240,137,251.09
  5. Step 5: Solve for x
    x = 240,137,251.09/20,831.45
  6. Step 6: Final answer
    x = 11,527.63

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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.