Home / 18,939.32-26,135.51-11,389.90

Finding the Fourth Proportional to 18,939.32, 26,135.51 and 11,389.90

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Solution

The fourth proportional to 18,939.32, 26,135.51 and 11,389.90 is: 15,717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.32 : 26,135.51 = 11,389.90 : x
  2. Step 2: Convert to fraction form
    18,939.32/26,135.51 = 11,389.90/x
  3. Step 3: Cross multiply
    18,939.32x = 26,135.51 × 11,389.90
  4. Step 4: Simplify right side
    18,939.32x = 297,680,808.48
  5. Step 5: Solve for x
    x = 297,680,808.48/18,939.32
  6. Step 6: Final answer
    x = 15,717.61

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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.