Home / 13,135.97-18,121.35-8,888.51

Finding the Fourth Proportional to 13,135.97, 18,121.35 and 8,888.51

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Solution

The fourth proportional to 13,135.97, 18,121.35 and 8,888.51 is: 12,261.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.97 : 18,121.35 = 8,888.51 : x
  2. Step 2: Convert to fraction form
    13,135.97/18,121.35 = 8,888.51/x
  3. Step 3: Cross multiply
    13,135.97x = 18,121.35 × 8,888.51
  4. Step 4: Simplify right side
    13,135.97x = 161,071,800.69
  5. Step 5: Solve for x
    x = 161,071,800.69/13,135.97
  6. Step 6: Final answer
    x = 12,261.89

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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.