Home / 13,680.57-20,505.83-5,359.04

Finding the Fourth Proportional to 13,680.57, 20,505.83 and 5,359.04

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Solution

The fourth proportional to 13,680.57, 20,505.83 and 5,359.04 is: 8,032.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.57 : 20,505.83 = 5,359.04 : x
  2. Step 2: Convert to fraction form
    13,680.57/20,505.83 = 5,359.04/x
  3. Step 3: Cross multiply
    13,680.57x = 20,505.83 × 5,359.04
  4. Step 4: Simplify right side
    13,680.57x = 109,891,510.78
  5. Step 5: Solve for x
    x = 109,891,510.78/13,680.57
  6. Step 6: Final answer
    x = 8,032.67

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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.