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Finding the Fourth Proportional to 12,654.54, 18,985.65 and 8,963.91

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Solution

The fourth proportional to 12,654.54, 18,985.65 and 8,963.91 is: 13,448.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.54 : 18,985.65 = 8,963.91 : x
  2. Step 2: Convert to fraction form
    12,654.54/18,985.65 = 8,963.91/x
  3. Step 3: Cross multiply
    12,654.54x = 18,985.65 × 8,963.91
  4. Step 4: Simplify right side
    12,654.54x = 170,185,657.89
  5. Step 5: Solve for x
    x = 170,185,657.89/12,654.54
  6. Step 6: Final answer
    x = 13,448.59

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1.5x scale

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.