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Finding the Fourth Proportional to 18,903.65, 26,085.44 and 11,141.21

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Solution

The fourth proportional to 18,903.65, 26,085.44 and 11,141.21 is: 15,373.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.65 : 26,085.44 = 11,141.21 : x
  2. Step 2: Convert to fraction form
    18,903.65/26,085.44 = 11,141.21/x
  3. Step 3: Cross multiply
    18,903.65x = 26,085.44 × 11,141.21
  4. Step 4: Simplify right side
    18,903.65x = 290,623,458.05
  5. Step 5: Solve for x
    x = 290,623,458.05/18,903.65
  6. Step 6: Final answer
    x = 15,373.94

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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.