Home / 19,989.81-29,973.71-8,140.56

Finding the Fourth Proportional to 19,989.81, 29,973.71 and 8,140.56

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Solution

The fourth proportional to 19,989.81, 29,973.71 and 8,140.56 is: 12,206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.81 : 29,973.71 = 8,140.56 : x
  2. Step 2: Convert to fraction form
    19,989.81/29,973.71 = 8,140.56/x
  3. Step 3: Cross multiply
    19,989.81x = 29,973.71 × 8,140.56
  4. Step 4: Simplify right side
    19,989.81x = 244,002,784.68
  5. Step 5: Solve for x
    x = 244,002,784.68/19,989.81
  6. Step 6: Final answer
    x = 12,206.36

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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.