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Finding the Fourth Proportional to 9,343.05, 12,893.18 and 5,151.21

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Solution

The fourth proportional to 9,343.05, 12,893.18 and 5,151.21 is: 7,108.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,343.05 : 12,893.18 = 5,151.21 : x
  2. Step 2: Convert to fraction form
    9,343.05/12,893.18 = 5,151.21/x
  3. Step 3: Cross multiply
    9,343.05x = 12,893.18 × 5,151.21
  4. Step 4: Simplify right side
    9,343.05x = 66,415,451.99
  5. Step 5: Solve for x
    x = 66,415,451.99/9,343.05
  6. Step 6: Final answer
    x = 7,108.54

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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.