Home / 20,503.82-28,299.87-13,426.13

Finding the Fourth Proportional to 20,503.82, 28,299.87 and 13,426.13

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Solution

The fourth proportional to 20,503.82, 28,299.87 and 13,426.13 is: 18,531.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.82 : 28,299.87 = 13,426.13 : x
  2. Step 2: Convert to fraction form
    20,503.82/28,299.87 = 13,426.13/x
  3. Step 3: Cross multiply
    20,503.82x = 28,299.87 × 13,426.13
  4. Step 4: Simplify right side
    20,503.82x = 379,957,733.60
  5. Step 5: Solve for x
    x = 379,957,733.60/20,503.82
  6. Step 6: Final answer
    x = 18,531.07

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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.