Home / 12,076.30-18,090.15-8,139.70

Finding the Fourth Proportional to 12,076.30, 18,090.15 and 8,139.70

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Solution

The fourth proportional to 12,076.30, 18,090.15 and 8,139.70 is: 12,193.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,076.30 : 18,090.15 = 8,139.70 : x
  2. Step 2: Convert to fraction form
    12,076.30/18,090.15 = 8,139.70/x
  3. Step 3: Cross multiply
    12,076.30x = 18,090.15 × 8,139.70
  4. Step 4: Simplify right side
    12,076.30x = 147,248,393.96
  5. Step 5: Solve for x
    x = 147,248,393.96/12,076.30
  6. Step 6: Final answer
    x = 12,193.17

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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.