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Finding the Fourth Proportional to 6,424.40, 8,865.61 and 3,553.13

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Solution

The fourth proportional to 6,424.40, 8,865.61 and 3,553.13 is: 4,903.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,424.40 : 8,865.61 = 3,553.13 : x
  2. Step 2: Convert to fraction form
    6,424.40/8,865.61 = 3,553.13/x
  3. Step 3: Cross multiply
    6,424.40x = 8,865.61 × 3,553.13
  4. Step 4: Simplify right side
    6,424.40x = 31,500,646.07
  5. Step 5: Solve for x
    x = 31,500,646.07/6,424.40
  6. Step 6: Final answer
    x = 4,903.28

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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.