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Finding the Fourth Proportional to 7,124.61, 9,822.42 and 4,997.28

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Solution

The fourth proportional to 7,124.61, 9,822.42 and 4,997.28 is: 6,889.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.61 : 9,822.42 = 4,997.28 : x
  2. Step 2: Convert to fraction form
    7,124.61/9,822.42 = 4,997.28/x
  3. Step 3: Cross multiply
    7,124.61x = 9,822.42 × 4,997.28
  4. Step 4: Simplify right side
    7,124.61x = 49,085,383.02
  5. Step 5: Solve for x
    x = 49,085,383.02/7,124.61
  6. Step 6: Final answer
    x = 6,889.55

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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.