Home / 20,425.71-28,198.23-13,746.45

Finding the Fourth Proportional to 20,425.71, 28,198.23 and 13,746.45

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Solution

The fourth proportional to 20,425.71, 28,198.23 and 13,746.45 is: 18,977.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.71 : 28,198.23 = 13,746.45 : x
  2. Step 2: Convert to fraction form
    20,425.71/28,198.23 = 13,746.45/x
  3. Step 3: Cross multiply
    20,425.71x = 28,198.23 × 13,746.45
  4. Step 4: Simplify right side
    20,425.71x = 387,625,558.78
  5. Step 5: Solve for x
    x = 387,625,558.78/20,425.71
  6. Step 6: Final answer
    x = 18,977.34

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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.