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Finding the Fourth Proportional to 13,358.67, 18,434.88 and 7,390.20

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Solution

The fourth proportional to 13,358.67, 18,434.88 and 7,390.20 is: 10,198.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,358.67 : 18,434.88 = 7,390.20 : x
  2. Step 2: Convert to fraction form
    13,358.67/18,434.88 = 7,390.20/x
  3. Step 3: Cross multiply
    13,358.67x = 18,434.88 × 7,390.20
  4. Step 4: Simplify right side
    13,358.67x = 136,237,519.31
  5. Step 5: Solve for x
    x = 136,237,519.31/13,358.67
  6. Step 6: Final answer
    x = 10,198.44

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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.