Home / 21,617.29-29,831.90-12,185.85

Finding the Fourth Proportional to 21,617.29, 29,831.90 and 12,185.85

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Solution

The fourth proportional to 21,617.29, 29,831.90 and 12,185.85 is: 16,816.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.29 : 29,831.90 = 12,185.85 : x
  2. Step 2: Convert to fraction form
    21,617.29/29,831.90 = 12,185.85/x
  3. Step 3: Cross multiply
    21,617.29x = 29,831.90 × 12,185.85
  4. Step 4: Simplify right side
    21,617.29x = 363,526,909.46
  5. Step 5: Solve for x
    x = 363,526,909.46/21,617.29
  6. Step 6: Final answer
    x = 16,816.49

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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.