Home / 20,605.05-28,426.92-13,443.39

Finding the Fourth Proportional to 20,605.05, 28,426.92 and 13,443.39

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Solution

The fourth proportional to 20,605.05, 28,426.92 and 13,443.39 is: 18,546.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.05 : 28,426.92 = 13,443.39 : x
  2. Step 2: Convert to fraction form
    20,605.05/28,426.92 = 13,443.39/x
  3. Step 3: Cross multiply
    20,605.05x = 28,426.92 × 13,443.39
  4. Step 4: Simplify right side
    20,605.05x = 382,154,172.06
  5. Step 5: Solve for x
    x = 382,154,172.06/20,605.05
  6. Step 6: Final answer
    x = 18,546.63

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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.