Home / 13,715.82-18,916.56-8,406.90

Finding the Fourth Proportional to 13,715.82, 18,916.56 and 8,406.90

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Solution

The fourth proportional to 13,715.82, 18,916.56 and 8,406.90 is: 11,594.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.82 : 18,916.56 = 8,406.90 : x
  2. Step 2: Convert to fraction form
    13,715.82/18,916.56 = 8,406.90/x
  3. Step 3: Cross multiply
    13,715.82x = 18,916.56 × 8,406.90
  4. Step 4: Simplify right side
    13,715.82x = 159,029,628.26
  5. Step 5: Solve for x
    x = 159,029,628.26/13,715.82
  6. Step 6: Final answer
    x = 11,594.61

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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.