Home / 20,651.18-28,503.17-13,578.26

Finding the Fourth Proportional to 20,651.18, 28,503.17 and 13,578.26

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Solution

The fourth proportional to 20,651.18, 28,503.17 and 13,578.26 is: 18,740.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.18 : 28,503.17 = 13,578.26 : x
  2. Step 2: Convert to fraction form
    20,651.18/28,503.17 = 13,578.26/x
  3. Step 3: Cross multiply
    20,651.18x = 28,503.17 × 13,578.26
  4. Step 4: Simplify right side
    20,651.18x = 387,023,453.08
  5. Step 5: Solve for x
    x = 387,023,453.08/20,651.18
  6. Step 6: Final answer
    x = 18,740.98

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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.