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Finding the Fourth Proportional to 13,397.79, 18,487.74 and 7,429.44

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Solution

The fourth proportional to 13,397.79, 18,487.74 and 7,429.44 is: 10,251.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.79 : 18,487.74 = 7,429.44 : x
  2. Step 2: Convert to fraction form
    13,397.79/18,487.74 = 7,429.44/x
  3. Step 3: Cross multiply
    13,397.79x = 18,487.74 × 7,429.44
  4. Step 4: Simplify right side
    13,397.79x = 137,353,652.26
  5. Step 5: Solve for x
    x = 137,353,652.26/13,397.79
  6. Step 6: Final answer
    x = 10,251.96

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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.