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Finding the Fourth Proportional to 15,602.78, 21,531.93 and 8,529.41

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Solution

The fourth proportional to 15,602.78, 21,531.93 and 8,529.41 is: 11,770.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,602.78 : 21,531.93 = 8,529.41 : x
  2. Step 2: Convert to fraction form
    15,602.78/21,531.93 = 8,529.41/x
  3. Step 3: Cross multiply
    15,602.78x = 21,531.93 × 8,529.41
  4. Step 4: Simplify right side
    15,602.78x = 183,654,659.06
  5. Step 5: Solve for x
    x = 183,654,659.06/15,602.78
  6. Step 6: Final answer
    x = 11,770.64

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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.