Home / 13,129.34-18,121.93-7,467.39

Finding the Fourth Proportional to 13,129.34, 18,121.93 and 7,467.39

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Solution

The fourth proportional to 13,129.34, 18,121.93 and 7,467.39 is: 10,306.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.34 : 18,121.93 = 7,467.39 : x
  2. Step 2: Convert to fraction form
    13,129.34/18,121.93 = 7,467.39/x
  3. Step 3: Cross multiply
    13,129.34x = 18,121.93 × 7,467.39
  4. Step 4: Simplify right side
    13,129.34x = 135,323,500.19
  5. Step 5: Solve for x
    x = 135,323,500.19/13,129.34
  6. Step 6: Final answer
    x = 10,306.96

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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.