Home / 22,991.13-31,727.48-12,921.28

Finding the Fourth Proportional to 22,991.13, 31,727.48 and 12,921.28

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Solution

The fourth proportional to 22,991.13, 31,727.48 and 12,921.28 is: 17,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,991.13 : 31,727.48 = 12,921.28 : x
  2. Step 2: Convert to fraction form
    22,991.13/31,727.48 = 12,921.28/x
  3. Step 3: Cross multiply
    22,991.13x = 31,727.48 × 12,921.28
  4. Step 4: Simplify right side
    22,991.13x = 409,959,658.35
  5. Step 5: Solve for x
    x = 409,959,658.35/22,991.13
  6. Step 6: Final answer
    x = 17,831.21

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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.