Home / 13,439.68-20,161.44-5,646.40

Finding the Fourth Proportional to 13,439.68, 20,161.44 and 5,646.40

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Solution

The fourth proportional to 13,439.68, 20,161.44 and 5,646.40 is: 8,470.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.68 : 20,161.44 = 5,646.40 : x
  2. Step 2: Convert to fraction form
    13,439.68/20,161.44 = 5,646.40/x
  3. Step 3: Cross multiply
    13,439.68x = 20,161.44 × 5,646.40
  4. Step 4: Simplify right side
    13,439.68x = 113,839,554.82
  5. Step 5: Solve for x
    x = 113,839,554.82/13,439.68
  6. Step 6: Final answer
    x = 8,470.41

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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.