Home / 3,938.79-5,909.93-2,089.45

Finding the Fourth Proportional to 3,938.79, 5,909.93 and 2,089.45

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Solution

The fourth proportional to 3,938.79, 5,909.93 and 2,089.45 is: 3,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.79 : 5,909.93 = 2,089.45 : x
  2. Step 2: Convert to fraction form
    3,938.79/5,909.93 = 2,089.45/x
  3. Step 3: Cross multiply
    3,938.79x = 5,909.93 × 2,089.45
  4. Step 4: Simplify right side
    3,938.79x = 12,348,511.26
  5. Step 5: Solve for x
    x = 12,348,511.26/3,938.79
  6. Step 6: Final answer
    x = 3,135.10

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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.