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Finding the Fourth Proportional to 13,394.68, 18,485.11 and 7,426

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Solution

The fourth proportional to 13,394.68, 18,485.11 and 7,426 is: 10,248.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,394.68 : 18,485.11 = 7,426 : x
  2. Step 2: Convert to fraction form
    13,394.68/18,485.11 = 7,426/x
  3. Step 3: Cross multiply
    13,394.68x = 18,485.11 × 7,426
  4. Step 4: Simplify right side
    13,394.68x = 137,270,426.86
  5. Step 5: Solve for x
    x = 137,270,426.86/13,394.68
  6. Step 6: Final answer
    x = 10,248.13

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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.