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Finding the Fourth Proportional to 19,489.71, 29,237.65 and 8,399.57

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Solution

The fourth proportional to 19,489.71, 29,237.65 and 8,399.57 is: 12,600.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.71 : 29,237.65 = 8,399.57 : x
  2. Step 2: Convert to fraction form
    19,489.71/29,237.65 = 8,399.57/x
  3. Step 3: Cross multiply
    19,489.71x = 29,237.65 × 8,399.57
  4. Step 4: Simplify right side
    19,489.71x = 245,583,687.81
  5. Step 5: Solve for x
    x = 245,583,687.81/19,489.71
  6. Step 6: Final answer
    x = 12,600.68

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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.