Home / 12,999.33-19,499.00-3,138.60

Finding the Fourth Proportional to 12,999.33, 19,499.00 and 3,138.60

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Solution

The fourth proportional to 12,999.33, 19,499.00 and 3,138.60 is: 4,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.33 : 19,499.00 = 3,138.60 : x
  2. Step 2: Convert to fraction form
    12,999.33/19,499.00 = 3,138.60/x
  3. Step 3: Cross multiply
    12,999.33x = 19,499.00 × 3,138.60
  4. Step 4: Simplify right side
    12,999.33x = 61,199,545.71
  5. Step 5: Solve for x
    x = 61,199,545.71/12,999.33
  6. Step 6: Final answer
    x = 4,707.90

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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.