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Finding the Fourth Proportional to 18,999.40, 26,218.66 and 10,615.40

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Solution

The fourth proportional to 18,999.40, 26,218.66 and 10,615.40 is: 14,648.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.40 : 26,218.66 = 10,615.40 : x
  2. Step 2: Convert to fraction form
    18,999.40/26,218.66 = 10,615.40/x
  3. Step 3: Cross multiply
    18,999.40x = 26,218.66 × 10,615.40
  4. Step 4: Simplify right side
    18,999.40x = 278,321,563.36
  5. Step 5: Solve for x
    x = 278,321,563.36/18,999.40
  6. Step 6: Final answer
    x = 14,648.97

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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.