Home / 13,135.27-18,125.72-7,166.81

Finding the Fourth Proportional to 13,135.27, 18,125.72 and 7,166.81

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Solution

The fourth proportional to 13,135.27, 18,125.72 and 7,166.81 is: 9,889.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.27 : 18,125.72 = 7,166.81 : x
  2. Step 2: Convert to fraction form
    13,135.27/18,125.72 = 7,166.81/x
  3. Step 3: Cross multiply
    13,135.27x = 18,125.72 × 7,166.81
  4. Step 4: Simplify right side
    13,135.27x = 129,903,600.83
  5. Step 5: Solve for x
    x = 129,903,600.83/13,135.27
  6. Step 6: Final answer
    x = 9,889.68

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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.