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Finding the Fourth Proportional to 13,997.79, 20,997.80 and 4,637.43

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Solution

The fourth proportional to 13,997.79, 20,997.80 and 4,637.43 is: 6,956.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,997.79 : 20,997.80 = 4,637.43 : x
  2. Step 2: Convert to fraction form
    13,997.79/20,997.80 = 4,637.43/x
  3. Step 3: Cross multiply
    13,997.79x = 20,997.80 × 4,637.43
  4. Step 4: Simplify right side
    13,997.79x = 97,375,827.65
  5. Step 5: Solve for x
    x = 97,375,827.65/13,997.79
  6. Step 6: Final answer
    x = 6,956.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.