Home / 19,920.40-29,883.36-6,769.28

Finding the Fourth Proportional to 19,920.40, 29,883.36 and 6,769.28

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Solution

The fourth proportional to 19,920.40, 29,883.36 and 6,769.28 is: 10,154.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.40 : 29,883.36 = 6,769.28 : x
  2. Step 2: Convert to fraction form
    19,920.40/29,883.36 = 6,769.28/x
  3. Step 3: Cross multiply
    19,920.40x = 29,883.36 × 6,769.28
  4. Step 4: Simplify right side
    19,920.40x = 202,288,831.18
  5. Step 5: Solve for x
    x = 202,288,831.18/19,920.40
  6. Step 6: Final answer
    x = 10,154.86

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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.