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Finding the Fourth Proportional to 12,654.40, 18,983.80 and 5,254.80

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Solution

The fourth proportional to 12,654.40, 18,983.80 and 5,254.80 is: 7,883.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.40 : 18,983.80 = 5,254.80 : x
  2. Step 2: Convert to fraction form
    12,654.40/18,983.80 = 5,254.80/x
  3. Step 3: Cross multiply
    12,654.40x = 18,983.80 × 5,254.80
  4. Step 4: Simplify right side
    12,654.40x = 99,756,072.24
  5. Step 5: Solve for x
    x = 99,756,072.24/12,654.40
  6. Step 6: Final answer
    x = 7,883.11

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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.