Home / 13,578.75-20,368.11-3,718.80

Finding the Fourth Proportional to 13,578.75, 20,368.11 and 3,718.80

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Solution

The fourth proportional to 13,578.75, 20,368.11 and 3,718.80 is: 5,578.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.75 : 20,368.11 = 3,718.80 : x
  2. Step 2: Convert to fraction form
    13,578.75/20,368.11 = 3,718.80/x
  3. Step 3: Cross multiply
    13,578.75x = 20,368.11 × 3,718.80
  4. Step 4: Simplify right side
    13,578.75x = 75,744,927.47
  5. Step 5: Solve for x
    x = 75,744,927.47/13,578.75
  6. Step 6: Final answer
    x = 5,578.20

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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.