Home / 12,278.02-18,421.58-7,351.11

Finding the Fourth Proportional to 12,278.02, 18,421.58 and 7,351.11

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Solution

The fourth proportional to 12,278.02, 18,421.58 and 7,351.11 is: 11,029.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.02 : 18,421.58 = 7,351.11 : x
  2. Step 2: Convert to fraction form
    12,278.02/18,421.58 = 7,351.11/x
  3. Step 3: Cross multiply
    12,278.02x = 18,421.58 × 7,351.11
  4. Step 4: Simplify right side
    12,278.02x = 135,419,060.95
  5. Step 5: Solve for x
    x = 135,419,060.95/12,278.02
  6. Step 6: Final answer
    x = 11,029.39

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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.