Home / 12,168.83-18,240.80-4,763.21

Finding the Fourth Proportional to 12,168.83, 18,240.80 and 4,763.21

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Solution

The fourth proportional to 12,168.83, 18,240.80 and 4,763.21 is: 7,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,168.83 : 18,240.80 = 4,763.21 : x
  2. Step 2: Convert to fraction form
    12,168.83/18,240.80 = 4,763.21/x
  3. Step 3: Cross multiply
    12,168.83x = 18,240.80 × 4,763.21
  4. Step 4: Simplify right side
    12,168.83x = 86,884,645.95
  5. Step 5: Solve for x
    x = 86,884,645.95/12,168.83
  6. Step 6: Final answer
    x = 7,139.93

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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.