Home / 13,789.76-20,642.80-12,474.06

Finding the Fourth Proportional to 13,789.76, 20,642.80 and 12,474.06

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Solution

The fourth proportional to 13,789.76, 20,642.80 and 12,474.06 is: 18,673.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.76 : 20,642.80 = 12,474.06 : x
  2. Step 2: Convert to fraction form
    13,789.76/20,642.80 = 12,474.06/x
  3. Step 3: Cross multiply
    13,789.76x = 20,642.80 × 12,474.06
  4. Step 4: Simplify right side
    13,789.76x = 257,499,494.58
  5. Step 5: Solve for x
    x = 257,499,494.58/13,789.76
  6. Step 6: Final answer
    x = 18,673.25

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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.