Home / 13,640.71-20,463.40-4,278.94

Finding the Fourth Proportional to 13,640.71, 20,463.40 and 4,278.94

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Solution

The fourth proportional to 13,640.71, 20,463.40 and 4,278.94 is: 6,419.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.71 : 20,463.40 = 4,278.94 : x
  2. Step 2: Convert to fraction form
    13,640.71/20,463.40 = 4,278.94/x
  3. Step 3: Cross multiply
    13,640.71x = 20,463.40 × 4,278.94
  4. Step 4: Simplify right side
    13,640.71x = 87,561,537.08
  5. Step 5: Solve for x
    x = 87,561,537.08/13,640.71
  6. Step 6: Final answer
    x = 6,419.13

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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.