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Finding the Fourth Proportional to 18,999, 26,218.62 and 10,615.50

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Solution

The fourth proportional to 18,999, 26,218.62 and 10,615.50 is: 14,649.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999 : 26,218.62 = 10,615.50 : x
  2. Step 2: Convert to fraction form
    18,999/26,218.62 = 10,615.50/x
  3. Step 3: Cross multiply
    18,999x = 26,218.62 × 10,615.50
  4. Step 4: Simplify right side
    18,999x = 278,323,760.61
  5. Step 5: Solve for x
    x = 278,323,760.61/18,999
  6. Step 6: Final answer
    x = 14,649.39

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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.