Home / 13,421.28-18,519.96-7,451.58

Finding the Fourth Proportional to 13,421.28, 18,519.96 and 7,451.58

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Solution

The fourth proportional to 13,421.28, 18,519.96 and 7,451.58 is: 10,282.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.28 : 18,519.96 = 7,451.58 : x
  2. Step 2: Convert to fraction form
    13,421.28/18,519.96 = 7,451.58/x
  3. Step 3: Cross multiply
    13,421.28x = 18,519.96 × 7,451.58
  4. Step 4: Simplify right side
    13,421.28x = 138,002,963.54
  5. Step 5: Solve for x
    x = 138,002,963.54/13,421.28
  6. Step 6: Final answer
    x = 10,282.40

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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.