Home / 13,290.68-18,340.58-7,621.49

Finding the Fourth Proportional to 13,290.68, 18,340.58 and 7,621.49

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Solution

The fourth proportional to 13,290.68, 18,340.58 and 7,621.49 is: 10,517.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.68 : 18,340.58 = 7,621.49 : x
  2. Step 2: Convert to fraction form
    13,290.68/18,340.58 = 7,621.49/x
  3. Step 3: Cross multiply
    13,290.68x = 18,340.58 × 7,621.49
  4. Step 4: Simplify right side
    13,290.68x = 139,782,508.96
  5. Step 5: Solve for x
    x = 139,782,508.96/13,290.68
  6. Step 6: Final answer
    x = 10,517.33

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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.