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Finding the Fourth Proportional to 18,999.60, 26,213.64 and 11,040.30

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Solution

The fourth proportional to 18,999.60, 26,213.64 and 11,040.30 is: 15,232.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.60 : 26,213.64 = 11,040.30 : x
  2. Step 2: Convert to fraction form
    18,999.60/26,213.64 = 11,040.30/x
  3. Step 3: Cross multiply
    18,999.60x = 26,213.64 × 11,040.30
  4. Step 4: Simplify right side
    18,999.60x = 289,406,449.69
  5. Step 5: Solve for x
    x = 289,406,449.69/18,999.60
  6. Step 6: Final answer
    x = 15,232.24

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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.