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Finding the Fourth Proportional to 18,817.62, 25,968.40 and 10,434.12

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Solution

The fourth proportional to 18,817.62, 25,968.40 and 10,434.12 is: 14,399.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,817.62 : 25,968.40 = 10,434.12 : x
  2. Step 2: Convert to fraction form
    18,817.62/25,968.40 = 10,434.12/x
  3. Step 3: Cross multiply
    18,817.62x = 25,968.40 × 10,434.12
  4. Step 4: Simplify right side
    18,817.62x = 270,957,401.81
  5. Step 5: Solve for x
    x = 270,957,401.81/18,817.62
  6. Step 6: Final answer
    x = 14,399.13

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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.