Home / 13,878.72-20,846.70-13,279.86

Finding the Fourth Proportional to 13,878.72, 20,846.70 and 13,279.86

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Solution

The fourth proportional to 13,878.72, 20,846.70 and 13,279.86 is: 19,947.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,878.72 : 20,846.70 = 13,279.86 : x
  2. Step 2: Convert to fraction form
    13,878.72/20,846.70 = 13,279.86/x
  3. Step 3: Cross multiply
    13,878.72x = 20,846.70 × 13,279.86
  4. Step 4: Simplify right side
    13,878.72x = 276,841,257.46
  5. Step 5: Solve for x
    x = 276,841,257.46/13,878.72
  6. Step 6: Final answer
    x = 19,947.18

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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.