Home / 18,939.64-26,136.76-11,390.30

Finding the Fourth Proportional to 18,939.64, 26,136.76 and 11,390.30

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Solution

The fourth proportional to 18,939.64, 26,136.76 and 11,390.30 is: 15,718.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.64 : 26,136.76 = 11,390.30 : x
  2. Step 2: Convert to fraction form
    18,939.64/26,136.76 = 11,390.30/x
  3. Step 3: Cross multiply
    18,939.64x = 26,136.76 × 11,390.30
  4. Step 4: Simplify right side
    18,939.64x = 297,705,537.43
  5. Step 5: Solve for x
    x = 297,705,537.43/18,939.64
  6. Step 6: Final answer
    x = 15,718.65

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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.