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Finding the Fourth Proportional to 13,393.69, 18,482.79 and 7,425.22

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Solution

The fourth proportional to 13,393.69, 18,482.79 and 7,425.22 is: 10,246.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.69 : 18,482.79 = 7,425.22 : x
  2. Step 2: Convert to fraction form
    13,393.69/18,482.79 = 7,425.22/x
  3. Step 3: Cross multiply
    13,393.69x = 18,482.79 × 7,425.22
  4. Step 4: Simplify right side
    13,393.69x = 137,238,781.96
  5. Step 5: Solve for x
    x = 137,238,781.96/13,393.69
  6. Step 6: Final answer
    x = 10,246.53

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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.