Home / 13,580.53-20,366.88-3,720.13

Finding the Fourth Proportional to 13,580.53, 20,366.88 and 3,720.13

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Solution

The fourth proportional to 13,580.53, 20,366.88 and 3,720.13 is: 5,579.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.53 : 20,366.88 = 3,720.13 : x
  2. Step 2: Convert to fraction form
    13,580.53/20,366.88 = 3,720.13/x
  3. Step 3: Cross multiply
    13,580.53x = 20,366.88 × 3,720.13
  4. Step 4: Simplify right side
    13,580.53x = 75,767,376.43
  5. Step 5: Solve for x
    x = 75,767,376.43/13,580.53
  6. Step 6: Final answer
    x = 5,579.12

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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.