Home / 21,619.45-29,831.41-12,186.19

Finding the Fourth Proportional to 21,619.45, 29,831.41 and 12,186.19

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Solution

The fourth proportional to 21,619.45, 29,831.41 and 12,186.19 is: 16,815.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.45 : 29,831.41 = 12,186.19 : x
  2. Step 2: Convert to fraction form
    21,619.45/29,831.41 = 12,186.19/x
  3. Step 3: Cross multiply
    21,619.45x = 29,831.41 × 12,186.19
  4. Step 4: Simplify right side
    21,619.45x = 363,531,125.18
  5. Step 5: Solve for x
    x = 363,531,125.18/21,619.45
  6. Step 6: Final answer
    x = 16,815.01

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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.