Home / 21,617.28-29,831.28-12,185.64

Finding the Fourth Proportional to 21,617.28, 29,831.28 and 12,185.64

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Solution

The fourth proportional to 21,617.28, 29,831.28 and 12,185.64 is: 16,815.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.28 : 29,831.28 = 12,185.64 : x
  2. Step 2: Convert to fraction form
    21,617.28/29,831.28 = 12,185.64/x
  3. Step 3: Cross multiply
    21,617.28x = 29,831.28 × 12,185.64
  4. Step 4: Simplify right side
    21,617.28x = 363,513,238.82
  5. Step 5: Solve for x
    x = 363,513,238.82/21,617.28
  6. Step 6: Final answer
    x = 16,815.86

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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.