Home / 18,939.89-26,137.07-11,386.30

Finding the Fourth Proportional to 18,939.89, 26,137.07 and 11,386.30

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Solution

The fourth proportional to 18,939.89, 26,137.07 and 11,386.30 is: 15,713.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.89 : 26,137.07 = 11,386.30 : x
  2. Step 2: Convert to fraction form
    18,939.89/26,137.07 = 11,386.30/x
  3. Step 3: Cross multiply
    18,939.89x = 26,137.07 × 11,386.30
  4. Step 4: Simplify right side
    18,939.89x = 297,604,520.14
  5. Step 5: Solve for x
    x = 297,604,520.14/18,939.89
  6. Step 6: Final answer
    x = 15,713.11

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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.