Home / 20,994.27-28,970.37-13,336.94

Finding the Fourth Proportional to 20,994.27, 28,970.37 and 13,336.94

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Solution

The fourth proportional to 20,994.27, 28,970.37 and 13,336.94 is: 18,403.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.27 : 28,970.37 = 13,336.94 : x
  2. Step 2: Convert to fraction form
    20,994.27/28,970.37 = 13,336.94/x
  3. Step 3: Cross multiply
    20,994.27x = 28,970.37 × 13,336.94
  4. Step 4: Simplify right side
    20,994.27x = 386,375,941.62
  5. Step 5: Solve for x
    x = 386,375,941.62/20,994.27
  6. Step 6: Final answer
    x = 18,403.88

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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.