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Finding the Fourth Proportional to 20,637.65, 30,950.63 and 7,984.49

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Solution

The fourth proportional to 20,637.65, 30,950.63 and 7,984.49 is: 11,974.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.65 : 30,950.63 = 7,984.49 : x
  2. Step 2: Convert to fraction form
    20,637.65/30,950.63 = 7,984.49/x
  3. Step 3: Cross multiply
    20,637.65x = 30,950.63 × 7,984.49
  4. Step 4: Simplify right side
    20,637.65x = 247,124,801.05
  5. Step 5: Solve for x
    x = 247,124,801.05/20,637.65
  6. Step 6: Final answer
    x = 11,974.47

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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.