Home / 13,680.48-20,513.70-6,278.56

Finding the Fourth Proportional to 13,680.48, 20,513.70 and 6,278.56

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Solution

The fourth proportional to 13,680.48, 20,513.70 and 6,278.56 is: 9,414.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.48 : 20,513.70 = 6,278.56 : x
  2. Step 2: Convert to fraction form
    13,680.48/20,513.70 = 6,278.56/x
  3. Step 3: Cross multiply
    13,680.48x = 20,513.70 × 6,278.56
  4. Step 4: Simplify right side
    13,680.48x = 128,796,496.27
  5. Step 5: Solve for x
    x = 128,796,496.27/13,680.48
  6. Step 6: Final answer
    x = 9,414.62

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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.