Home / 19,991.61-29,989.15-5,200.53

Finding the Fourth Proportional to 19,991.61, 29,989.15 and 5,200.53

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Solution

The fourth proportional to 19,991.61, 29,989.15 and 5,200.53 is: 7,801.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,991.61 : 29,989.15 = 5,200.53 : x
  2. Step 2: Convert to fraction form
    19,991.61/29,989.15 = 5,200.53/x
  3. Step 3: Cross multiply
    19,991.61x = 29,989.15 × 5,200.53
  4. Step 4: Simplify right side
    19,991.61x = 155,959,551.79
  5. Step 5: Solve for x
    x = 155,959,551.79/19,991.61
  6. Step 6: Final answer
    x = 7,801.25

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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.