Home / 12,654.25-18,981.38-3,420.25

Finding the Fourth Proportional to 12,654.25, 18,981.38 and 3,420.25

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Solution

The fourth proportional to 12,654.25, 18,981.38 and 3,420.25 is: 5,130.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.25 : 18,981.38 = 3,420.25 : x
  2. Step 2: Convert to fraction form
    12,654.25/18,981.38 = 3,420.25/x
  3. Step 3: Cross multiply
    12,654.25x = 18,981.38 × 3,420.25
  4. Step 4: Simplify right side
    12,654.25x = 64,921,064.95
  5. Step 5: Solve for x
    x = 64,921,064.95/12,654.25
  6. Step 6: Final answer
    x = 5,130.38

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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.