Home / 30,919.20-46,382.04-13,390.80

Finding the Fourth Proportional to 30,919.20, 46,382.04 and 13,390.80

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Solution

The fourth proportional to 30,919.20, 46,382.04 and 13,390.80 is: 20,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.20 : 46,382.04 = 13,390.80 : x
  2. Step 2: Convert to fraction form
    30,919.20/46,382.04 = 13,390.80/x
  3. Step 3: Cross multiply
    30,919.20x = 46,382.04 × 13,390.80
  4. Step 4: Simplify right side
    30,919.20x = 621,092,621.23
  5. Step 5: Solve for x
    x = 621,092,621.23/30,919.20
  6. Step 6: Final answer
    x = 20,087.60

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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.