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Finding the Fourth Proportional to 6,990.79, 9,637.38 and 4,997.88

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Solution

The fourth proportional to 6,990.79, 9,637.38 and 4,997.88 is: 6,889.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.79 : 9,637.38 = 4,997.88 : x
  2. Step 2: Convert to fraction form
    6,990.79/9,637.38 = 4,997.88/x
  3. Step 3: Cross multiply
    6,990.79x = 9,637.38 × 4,997.88
  4. Step 4: Simplify right side
    6,990.79x = 48,166,468.75
  5. Step 5: Solve for x
    x = 48,166,468.75/6,990.79
  6. Step 6: Final answer
    x = 6,889.99

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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.