Home / 12,129.10-18,193.65-4,738.75

Finding the Fourth Proportional to 12,129.10, 18,193.65 and 4,738.75

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Solution

The fourth proportional to 12,129.10, 18,193.65 and 4,738.75 is: 7,108.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.10 : 18,193.65 = 4,738.75 : x
  2. Step 2: Convert to fraction form
    12,129.10/18,193.65 = 4,738.75/x
  3. Step 3: Cross multiply
    12,129.10x = 18,193.65 × 4,738.75
  4. Step 4: Simplify right side
    12,129.10x = 86,215,158.94
  5. Step 5: Solve for x
    x = 86,215,158.94/12,129.10
  6. Step 6: Final answer
    x = 7,108.13

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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.