Home / 21,623.28-29,831.54-13,122.30

Finding the Fourth Proportional to 21,623.28, 29,831.54 and 13,122.30

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Solution

The fourth proportional to 21,623.28, 29,831.54 and 13,122.30 is: 18,103.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,623.28 : 29,831.54 = 13,122.30 : x
  2. Step 2: Convert to fraction form
    21,623.28/29,831.54 = 13,122.30/x
  3. Step 3: Cross multiply
    21,623.28x = 29,831.54 × 13,122.30
  4. Step 4: Simplify right side
    21,623.28x = 391,458,417.34
  5. Step 5: Solve for x
    x = 391,458,417.34/21,623.28
  6. Step 6: Final answer
    x = 18,103.56

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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.