Home / 13,121.27-18,106.70-7,455.27

Finding the Fourth Proportional to 13,121.27, 18,106.70 and 7,455.27

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Solution

The fourth proportional to 13,121.27, 18,106.70 and 7,455.27 is: 10,287.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.27 : 18,106.70 = 7,455.27 : x
  2. Step 2: Convert to fraction form
    13,121.27/18,106.70 = 7,455.27/x
  3. Step 3: Cross multiply
    13,121.27x = 18,106.70 × 7,455.27
  4. Step 4: Simplify right side
    13,121.27x = 134,990,254.77
  5. Step 5: Solve for x
    x = 134,990,254.77/13,121.27
  6. Step 6: Final answer
    x = 10,287.90

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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.