Home / 13,720.35-20,578.38-4,359.14

Finding the Fourth Proportional to 13,720.35, 20,578.38 and 4,359.14

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Solution

The fourth proportional to 13,720.35, 20,578.38 and 4,359.14 is: 6,538.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.35 : 20,578.38 = 4,359.14 : x
  2. Step 2: Convert to fraction form
    13,720.35/20,578.38 = 4,359.14/x
  3. Step 3: Cross multiply
    13,720.35x = 20,578.38 × 4,359.14
  4. Step 4: Simplify right side
    13,720.35x = 89,703,914.71
  5. Step 5: Solve for x
    x = 89,703,914.71/13,720.35
  6. Step 6: Final answer
    x = 6,538.02

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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.