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Finding the Fourth Proportional to 18,302.86, 25,239.09 and 15,659.02

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Solution

The fourth proportional to 18,302.86, 25,239.09 and 15,659.02 is: 21,593.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,302.86 : 25,239.09 = 15,659.02 : x
  2. Step 2: Convert to fraction form
    18,302.86/25,239.09 = 15,659.02/x
  3. Step 3: Cross multiply
    18,302.86x = 25,239.09 × 15,659.02
  4. Step 4: Simplify right side
    18,302.86x = 395,219,415.09
  5. Step 5: Solve for x
    x = 395,219,415.09/18,302.86
  6. Step 6: Final answer
    x = 21,593.31

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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.