Home / 20,923.10-28,865.53-13,367.47

Finding the Fourth Proportional to 20,923.10, 28,865.53 and 13,367.47

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Solution

The fourth proportional to 20,923.10, 28,865.53 and 13,367.47 is: 18,441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.10 : 28,865.53 = 13,367.47 : x
  2. Step 2: Convert to fraction form
    20,923.10/28,865.53 = 13,367.47/x
  3. Step 3: Cross multiply
    20,923.10x = 28,865.53 × 13,367.47
  4. Step 4: Simplify right side
    20,923.10x = 385,859,106.31
  5. Step 5: Solve for x
    x = 385,859,106.31/20,923.10
  6. Step 6: Final answer
    x = 18,441.78

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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.