Home / 13,130.48-18,120.22-7,162.09

Finding the Fourth Proportional to 13,130.48, 18,120.22 and 7,162.09

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Solution

The fourth proportional to 13,130.48, 18,120.22 and 7,162.09 is: 9,883.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.48 : 18,120.22 = 7,162.09 : x
  2. Step 2: Convert to fraction form
    13,130.48/18,120.22 = 7,162.09/x
  3. Step 3: Cross multiply
    13,130.48x = 18,120.22 × 7,162.09
  4. Step 4: Simplify right side
    13,130.48x = 129,778,583.25
  5. Step 5: Solve for x
    x = 129,778,583.25/13,130.48
  6. Step 6: Final answer
    x = 9,883.76

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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.