Home / 13,530.57-18,672.31-7,480.72

Finding the Fourth Proportional to 13,530.57, 18,672.31 and 7,480.72

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Solution

The fourth proportional to 13,530.57, 18,672.31 and 7,480.72 is: 10,323.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,530.57 : 18,672.31 = 7,480.72 : x
  2. Step 2: Convert to fraction form
    13,530.57/18,672.31 = 7,480.72/x
  3. Step 3: Cross multiply
    13,530.57x = 18,672.31 × 7,480.72
  4. Step 4: Simplify right side
    13,530.57x = 139,682,313.48
  5. Step 5: Solve for x
    x = 139,682,313.48/13,530.57
  6. Step 6: Final answer
    x = 10,323.46

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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.