Home / 12,117.80-18,188.30-6,278.60

Finding the Fourth Proportional to 12,117.80, 18,188.30 and 6,278.60

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Solution

The fourth proportional to 12,117.80, 18,188.30 and 6,278.60 is: 9,423.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.80 : 18,188.30 = 6,278.60 : x
  2. Step 2: Convert to fraction form
    12,117.80/18,188.30 = 6,278.60/x
  3. Step 3: Cross multiply
    12,117.80x = 18,188.30 × 6,278.60
  4. Step 4: Simplify right side
    12,117.80x = 114,197,060.38
  5. Step 5: Solve for x
    x = 114,197,060.38/12,117.80
  6. Step 6: Final answer
    x = 9,423.91

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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.