Home / 12,815.80-19,223.70-5,418.34

Finding the Fourth Proportional to 12,815.80, 19,223.70 and 5,418.34

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Solution

The fourth proportional to 12,815.80, 19,223.70 and 5,418.34 is: 8,127.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.80 : 19,223.70 = 5,418.34 : x
  2. Step 2: Convert to fraction form
    12,815.80/19,223.70 = 5,418.34/x
  3. Step 3: Cross multiply
    12,815.80x = 19,223.70 × 5,418.34
  4. Step 4: Simplify right side
    12,815.80x = 104,160,542.66
  5. Step 5: Solve for x
    x = 104,160,542.66/12,815.80
  6. Step 6: Final answer
    x = 8,127.51

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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.