Home / 13,120.37-18,106.11-7,151.91

Finding the Fourth Proportional to 13,120.37, 18,106.11 and 7,151.91

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Solution

The fourth proportional to 13,120.37, 18,106.11 and 7,151.91 is: 9,869.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.37 : 18,106.11 = 7,151.91 : x
  2. Step 2: Convert to fraction form
    13,120.37/18,106.11 = 7,151.91/x
  3. Step 3: Cross multiply
    13,120.37x = 18,106.11 × 7,151.91
  4. Step 4: Simplify right side
    13,120.37x = 129,493,269.17
  5. Step 5: Solve for x
    x = 129,493,269.17/13,120.37
  6. Step 6: Final answer
    x = 9,869.64

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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.