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Finding the Fourth Proportional to 8,939.91, 13,349.64 and 7,299.66

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Solution

The fourth proportional to 8,939.91, 13,349.64 and 7,299.66 is: 10,900.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.91 : 13,349.64 = 7,299.66 : x
  2. Step 2: Convert to fraction form
    8,939.91/13,349.64 = 7,299.66/x
  3. Step 3: Cross multiply
    8,939.91x = 13,349.64 × 7,299.66
  4. Step 4: Simplify right side
    8,939.91x = 97,447,833.12
  5. Step 5: Solve for x
    x = 97,447,833.12/8,939.91
  6. Step 6: Final answer
    x = 10,900.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.