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Finding the Fourth Proportional to 5,720.29, 7,885.22 and 3,948.82

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Solution

The fourth proportional to 5,720.29, 7,885.22 and 3,948.82 is: 5,443.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.29 : 7,885.22 = 3,948.82 : x
  2. Step 2: Convert to fraction form
    5,720.29/7,885.22 = 3,948.82/x
  3. Step 3: Cross multiply
    5,720.29x = 7,885.22 × 3,948.82
  4. Step 4: Simplify right side
    5,720.29x = 31,137,274.98
  5. Step 5: Solve for x
    x = 31,137,274.98/5,720.29
  6. Step 6: Final answer
    x = 5,443.31

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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.