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Finding the Fourth Proportional to 13,387.34, 18,472.92 and 7,419.08

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Solution

The fourth proportional to 13,387.34, 18,472.92 and 7,419.08 is: 10,237.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.34 : 18,472.92 = 7,419.08 : x
  2. Step 2: Convert to fraction form
    13,387.34/18,472.92 = 7,419.08/x
  3. Step 3: Cross multiply
    13,387.34x = 18,472.92 × 7,419.08
  4. Step 4: Simplify right side
    13,387.34x = 137,052,071.31
  5. Step 5: Solve for x
    x = 137,052,071.31/13,387.34
  6. Step 6: Final answer
    x = 10,237.44

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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.