Home / 20,996.47-28,964.92-13,436.74

Finding the Fourth Proportional to 20,996.47, 28,964.92 and 13,436.74

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Solution

The fourth proportional to 20,996.47, 28,964.92 and 13,436.74 is: 18,536.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.47 : 28,964.92 = 13,436.74 : x
  2. Step 2: Convert to fraction form
    20,996.47/28,964.92 = 13,436.74/x
  3. Step 3: Cross multiply
    20,996.47x = 28,964.92 × 13,436.74
  4. Step 4: Simplify right side
    20,996.47x = 389,193,926.25
  5. Step 5: Solve for x
    x = 389,193,926.25/20,996.47
  6. Step 6: Final answer
    x = 18,536.16

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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.