Home / 21,391.99-29,521.15-11,831.40

Finding the Fourth Proportional to 21,391.99, 29,521.15 and 11,831.40

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Solution

The fourth proportional to 21,391.99, 29,521.15 and 11,831.40 is: 16,327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.99 : 29,521.15 = 11,831.40 : x
  2. Step 2: Convert to fraction form
    21,391.99/29,521.15 = 11,831.40/x
  3. Step 3: Cross multiply
    21,391.99x = 29,521.15 × 11,831.40
  4. Step 4: Simplify right side
    21,391.99x = 349,276,504.53
  5. Step 5: Solve for x
    x = 349,276,504.53/21,391.99
  6. Step 6: Final answer
    x = 16,327.45

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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.