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Finding the Fourth Proportional to 15,343.77, 21,171.99 and 9,375.69

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Solution

The fourth proportional to 15,343.77, 21,171.99 and 9,375.69 is: 12,936.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,343.77 : 21,171.99 = 9,375.69 : x
  2. Step 2: Convert to fraction form
    15,343.77/21,171.99 = 9,375.69/x
  3. Step 3: Cross multiply
    15,343.77x = 21,171.99 × 9,375.69
  4. Step 4: Simplify right side
    15,343.77x = 198,502,014.92
  5. Step 5: Solve for x
    x = 198,502,014.92/15,343.77
  6. Step 6: Final answer
    x = 12,936.98

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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.