Home / 13,130.87-18,120.66-7,162.52

Finding the Fourth Proportional to 13,130.87, 18,120.66 and 7,162.52

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Solution

The fourth proportional to 13,130.87, 18,120.66 and 7,162.52 is: 9,884.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.87 : 18,120.66 = 7,162.52 : x
  2. Step 2: Convert to fraction form
    13,130.87/18,120.66 = 7,162.52/x
  3. Step 3: Cross multiply
    13,130.87x = 18,120.66 × 7,162.52
  4. Step 4: Simplify right side
    13,130.87x = 129,789,589.66
  5. Step 5: Solve for x
    x = 129,789,589.66/13,130.87
  6. Step 6: Final answer
    x = 9,884.31

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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.