Home / 20,938.42-31,418.34-13,923.24

Finding the Fourth Proportional to 20,938.42, 31,418.34 and 13,923.24

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Solution

The fourth proportional to 20,938.42, 31,418.34 and 13,923.24 is: 20,891.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.42 : 31,418.34 = 13,923.24 : x
  2. Step 2: Convert to fraction form
    20,938.42/31,418.34 = 13,923.24/x
  3. Step 3: Cross multiply
    20,938.42x = 31,418.34 × 13,923.24
  4. Step 4: Simplify right side
    20,938.42x = 437,445,088.22
  5. Step 5: Solve for x
    x = 437,445,088.22/20,938.42
  6. Step 6: Final answer
    x = 20,891.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.