Home / 13,111.75-18,089.08-8,637.85

Finding the Fourth Proportional to 13,111.75, 18,089.08 and 8,637.85

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Solution

The fourth proportional to 13,111.75, 18,089.08 and 8,637.85 is: 11,916.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,111.75 : 18,089.08 = 8,637.85 : x
  2. Step 2: Convert to fraction form
    13,111.75/18,089.08 = 8,637.85/x
  3. Step 3: Cross multiply
    13,111.75x = 18,089.08 × 8,637.85
  4. Step 4: Simplify right side
    13,111.75x = 156,250,759.68
  5. Step 5: Solve for x
    x = 156,250,759.68/13,111.75
  6. Step 6: Final answer
    x = 11,916.85

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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.