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Finding the Fourth Proportional to 5,681.28, 7,821.99 and 5,557.35

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Solution

The fourth proportional to 5,681.28, 7,821.99 and 5,557.35 is: 7,651.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,681.28 : 7,821.99 = 5,557.35 : x
  2. Step 2: Convert to fraction form
    5,681.28/7,821.99 = 5,557.35/x
  3. Step 3: Cross multiply
    5,681.28x = 7,821.99 × 5,557.35
  4. Step 4: Simplify right side
    5,681.28x = 43,469,536.13
  5. Step 5: Solve for x
    x = 43,469,536.13/5,681.28
  6. Step 6: Final answer
    x = 7,651.36

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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.