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Finding the Fourth Proportional to 13,335.67, 18,402.45 and 7,964.17

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Solution

The fourth proportional to 13,335.67, 18,402.45 and 7,964.17 is: 10,990.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,335.67 : 18,402.45 = 7,964.17 : x
  2. Step 2: Convert to fraction form
    13,335.67/18,402.45 = 7,964.17/x
  3. Step 3: Cross multiply
    13,335.67x = 18,402.45 × 7,964.17
  4. Step 4: Simplify right side
    13,335.67x = 146,560,240.22
  5. Step 5: Solve for x
    x = 146,560,240.22/13,335.67
  6. Step 6: Final answer
    x = 10,990.09

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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.