Home / 13,539.28-20,308.80-3,678.49

Finding the Fourth Proportional to 13,539.28, 20,308.80 and 3,678.49

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Solution

The fourth proportional to 13,539.28, 20,308.80 and 3,678.49 is: 5,517.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.28 : 20,308.80 = 3,678.49 : x
  2. Step 2: Convert to fraction form
    13,539.28/20,308.80 = 3,678.49/x
  3. Step 3: Cross multiply
    13,539.28x = 20,308.80 × 3,678.49
  4. Step 4: Simplify right side
    13,539.28x = 74,705,689.43
  5. Step 5: Solve for x
    x = 74,705,689.43/13,539.28
  6. Step 6: Final answer
    x = 5,517.70

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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.