Home / 20,981.36-28,824.70-18,772.46

Finding the Fourth Proportional to 20,981.36, 28,824.70 and 18,772.46

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Solution

The fourth proportional to 20,981.36, 28,824.70 and 18,772.46 is: 25,790.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.36 : 28,824.70 = 18,772.46 : x
  2. Step 2: Convert to fraction form
    20,981.36/28,824.70 = 18,772.46/x
  3. Step 3: Cross multiply
    20,981.36x = 28,824.70 × 18,772.46
  4. Step 4: Simplify right side
    20,981.36x = 541,110,527.76
  5. Step 5: Solve for x
    x = 541,110,527.76/20,981.36
  6. Step 6: Final answer
    x = 25,790.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.