Home / 21,616.81-29,831.20-11,680.81

Finding the Fourth Proportional to 21,616.81, 29,831.20 and 11,680.81

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Solution

The fourth proportional to 21,616.81, 29,831.20 and 11,680.81 is: 16,119.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616.81 : 29,831.20 = 11,680.81 : x
  2. Step 2: Convert to fraction form
    21,616.81/29,831.20 = 11,680.81/x
  3. Step 3: Cross multiply
    21,616.81x = 29,831.20 × 11,680.81
  4. Step 4: Simplify right side
    21,616.81x = 348,452,579.27
  5. Step 5: Solve for x
    x = 348,452,579.27/21,616.81
  6. Step 6: Final answer
    x = 16,119.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.