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Finding the Fourth Proportional to 13,406.55, 18,502.11 and 7,439.39

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Solution

The fourth proportional to 13,406.55, 18,502.11 and 7,439.39 is: 10,266.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.55 : 18,502.11 = 7,439.39 : x
  2. Step 2: Convert to fraction form
    13,406.55/18,502.11 = 7,439.39/x
  3. Step 3: Cross multiply
    13,406.55x = 18,502.11 × 7,439.39
  4. Step 4: Simplify right side
    13,406.55x = 137,644,282.41
  5. Step 5: Solve for x
    x = 137,644,282.41/13,406.55
  6. Step 6: Final answer
    x = 10,266.94

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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.