Home / 18,928.69-26,129.79-11,859.21

Finding the Fourth Proportional to 18,928.69, 26,129.79 and 11,859.21

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Solution

The fourth proportional to 18,928.69, 26,129.79 and 11,859.21 is: 16,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928.69 : 26,129.79 = 11,859.21 : x
  2. Step 2: Convert to fraction form
    18,928.69/26,129.79 = 11,859.21/x
  3. Step 3: Cross multiply
    18,928.69x = 26,129.79 × 11,859.21
  4. Step 4: Simplify right side
    18,928.69x = 309,878,666.87
  5. Step 5: Solve for x
    x = 309,878,666.87/18,928.69
  6. Step 6: Final answer
    x = 16,370.85

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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.