Home / 20,455.39-28,227.95-13,381.66

Finding the Fourth Proportional to 20,455.39, 28,227.95 and 13,381.66

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Solution

The fourth proportional to 20,455.39, 28,227.95 and 13,381.66 is: 18,466.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.39 : 28,227.95 = 13,381.66 : x
  2. Step 2: Convert to fraction form
    20,455.39/28,227.95 = 13,381.66/x
  3. Step 3: Cross multiply
    20,455.39x = 28,227.95 × 13,381.66
  4. Step 4: Simplify right side
    20,455.39x = 377,736,691.92
  5. Step 5: Solve for x
    x = 377,736,691.92/20,455.39
  6. Step 6: Final answer
    x = 18,466.37

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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.