Home / 19,701.86-27,177.81-12,620.30

Finding the Fourth Proportional to 19,701.86, 27,177.81 and 12,620.30

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Solution

The fourth proportional to 19,701.86, 27,177.81 and 12,620.30 is: 17,409.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,701.86 : 27,177.81 = 12,620.30 : x
  2. Step 2: Convert to fraction form
    19,701.86/27,177.81 = 12,620.30/x
  3. Step 3: Cross multiply
    19,701.86x = 27,177.81 × 12,620.30
  4. Step 4: Simplify right side
    19,701.86x = 342,992,115.54
  5. Step 5: Solve for x
    x = 342,992,115.54/19,701.86
  6. Step 6: Final answer
    x = 17,409.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.