Home / 13,870.69-19,142.31-8,208.79

Finding the Fourth Proportional to 13,870.69, 19,142.31 and 8,208.79

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Solution

The fourth proportional to 13,870.69, 19,142.31 and 8,208.79 is: 11,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.69 : 19,142.31 = 8,208.79 : x
  2. Step 2: Convert to fraction form
    13,870.69/19,142.31 = 8,208.79/x
  3. Step 3: Cross multiply
    13,870.69x = 19,142.31 × 8,208.79
  4. Step 4: Simplify right side
    13,870.69x = 157,135,202.90
  5. Step 5: Solve for x
    x = 157,135,202.90/13,870.69
  6. Step 6: Final answer
    x = 11,328.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.