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Finding the Fourth Proportional to 12,420.71, 18,633.68 and 3,654.89

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Solution

The fourth proportional to 12,420.71, 18,633.68 and 3,654.89 is: 5,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.71 : 18,633.68 = 3,654.89 : x
  2. Step 2: Convert to fraction form
    12,420.71/18,633.68 = 3,654.89/x
  3. Step 3: Cross multiply
    12,420.71x = 18,633.68 × 3,654.89
  4. Step 4: Simplify right side
    12,420.71x = 68,104,050.70
  5. Step 5: Solve for x
    x = 68,104,050.70/12,420.71
  6. Step 6: Final answer
    x = 5,483.10

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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.