Home / 12,270.07-18,405.40-4,478.88

Finding the Fourth Proportional to 12,270.07, 18,405.40 and 4,478.88

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Solution

The fourth proportional to 12,270.07, 18,405.40 and 4,478.88 is: 6,718.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,270.07 : 18,405.40 = 4,478.88 : x
  2. Step 2: Convert to fraction form
    12,270.07/18,405.40 = 4,478.88/x
  3. Step 3: Cross multiply
    12,270.07x = 18,405.40 × 4,478.88
  4. Step 4: Simplify right side
    12,270.07x = 82,435,577.95
  5. Step 5: Solve for x
    x = 82,435,577.95/12,270.07
  6. Step 6: Final answer
    x = 6,718.43

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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.