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Finding the Fourth Proportional to 18,654.88, 27,985.20 and 6,340

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Solution

The fourth proportional to 18,654.88, 27,985.20 and 6,340 is: 9,510.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.88 : 27,985.20 = 6,340 : x
  2. Step 2: Convert to fraction form
    18,654.88/27,985.20 = 6,340/x
  3. Step 3: Cross multiply
    18,654.88x = 27,985.20 × 6,340
  4. Step 4: Simplify right side
    18,654.88x = 177,426,168
  5. Step 5: Solve for x
    x = 177,426,168/18,654.88
  6. Step 6: Final answer
    x = 9,510.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.