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Finding the Fourth Proportional to 6,617.94, 9,109.80 and 5,721.27

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Solution

The fourth proportional to 6,617.94, 9,109.80 and 5,721.27 is: 7,875.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,617.94 : 9,109.80 = 5,721.27 : x
  2. Step 2: Convert to fraction form
    6,617.94/9,109.80 = 5,721.27/x
  3. Step 3: Cross multiply
    6,617.94x = 9,109.80 × 5,721.27
  4. Step 4: Simplify right side
    6,617.94x = 52,119,625.45
  5. Step 5: Solve for x
    x = 52,119,625.45/6,617.94
  6. Step 6: Final answer
    x = 7,875.51

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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.