Home / 18,921.69-26,088.78-11,835.81

Finding the Fourth Proportional to 18,921.69, 26,088.78 and 11,835.81

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Solution

The fourth proportional to 18,921.69, 26,088.78 and 11,835.81 is: 16,318.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.69 : 26,088.78 = 11,835.81 : x
  2. Step 2: Convert to fraction form
    18,921.69/26,088.78 = 11,835.81/x
  3. Step 3: Cross multiply
    18,921.69x = 26,088.78 × 11,835.81
  4. Step 4: Simplify right side
    18,921.69x = 308,781,843.21
  5. Step 5: Solve for x
    x = 308,781,843.21/18,921.69
  6. Step 6: Final answer
    x = 16,318.94

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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.