Home / 20,696.40-28,560.70-12,197.17

Finding the Fourth Proportional to 20,696.40, 28,560.70 and 12,197.17

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Solution

The fourth proportional to 20,696.40, 28,560.70 and 12,197.17 is: 16,831.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.40 : 28,560.70 = 12,197.17 : x
  2. Step 2: Convert to fraction form
    20,696.40/28,560.70 = 12,197.17/x
  3. Step 3: Cross multiply
    20,696.40x = 28,560.70 × 12,197.17
  4. Step 4: Simplify right side
    20,696.40x = 348,359,713.22
  5. Step 5: Solve for x
    x = 348,359,713.22/20,696.40
  6. Step 6: Final answer
    x = 16,831.90

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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.