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Finding the Fourth Proportional to 13,149.91, 18,146.99 and 7,484.38

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Solution

The fourth proportional to 13,149.91, 18,146.99 and 7,484.38 is: 10,328.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.91 : 18,146.99 = 7,484.38 : x
  2. Step 2: Convert to fraction form
    13,149.91/18,146.99 = 7,484.38/x
  3. Step 3: Cross multiply
    13,149.91x = 18,146.99 × 7,484.38
  4. Step 4: Simplify right side
    13,149.91x = 135,818,896.99
  5. Step 5: Solve for x
    x = 135,818,896.99/13,149.91
  6. Step 6: Final answer
    x = 10,328.51

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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.