Home / 12,912.51-19,368.15-5,115.85

Finding the Fourth Proportional to 12,912.51, 19,368.15 and 5,115.85

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Solution

The fourth proportional to 12,912.51, 19,368.15 and 5,115.85 is: 7,673.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.51 : 19,368.15 = 5,115.85 : x
  2. Step 2: Convert to fraction form
    12,912.51/19,368.15 = 5,115.85/x
  3. Step 3: Cross multiply
    12,912.51x = 19,368.15 × 5,115.85
  4. Step 4: Simplify right side
    12,912.51x = 99,084,550.18
  5. Step 5: Solve for x
    x = 99,084,550.18/12,912.51
  6. Step 6: Final answer
    x = 7,673.53

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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.