Home / 12,378.84-18,557.82-8,418.99

Finding the Fourth Proportional to 12,378.84, 18,557.82 and 8,418.99

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Solution

The fourth proportional to 12,378.84, 18,557.82 and 8,418.99 is: 12,621.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.84 : 18,557.82 = 8,418.99 : x
  2. Step 2: Convert to fraction form
    12,378.84/18,557.82 = 8,418.99/x
  3. Step 3: Cross multiply
    12,378.84x = 18,557.82 × 8,418.99
  4. Step 4: Simplify right side
    12,378.84x = 156,238,101.00
  5. Step 5: Solve for x
    x = 156,238,101.00/12,378.84
  6. Step 6: Final answer
    x = 12,621.38

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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.