Home / 20,831.04-31,248.54-7,680.24

Finding the Fourth Proportional to 20,831.04, 31,248.54 and 7,680.24

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Solution

The fourth proportional to 20,831.04, 31,248.54 and 7,680.24 is: 11,521.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.04 : 31,248.54 = 7,680.24 : x
  2. Step 2: Convert to fraction form
    20,831.04/31,248.54 = 7,680.24/x
  3. Step 3: Cross multiply
    20,831.04x = 31,248.54 × 7,680.24
  4. Step 4: Simplify right side
    20,831.04x = 239,996,286.85
  5. Step 5: Solve for x
    x = 239,996,286.85/20,831.04
  6. Step 6: Final answer
    x = 11,521.09

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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.