Home / 13,180.42-18,188.31-7,515.40

Finding the Fourth Proportional to 13,180.42, 18,188.31 and 7,515.40

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Solution

The fourth proportional to 13,180.42, 18,188.31 and 7,515.40 is: 10,370.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,180.42 : 18,188.31 = 7,515.40 : x
  2. Step 2: Convert to fraction form
    13,180.42/18,188.31 = 7,515.40/x
  3. Step 3: Cross multiply
    13,180.42x = 18,188.31 × 7,515.40
  4. Step 4: Simplify right side
    13,180.42x = 136,692,424.97
  5. Step 5: Solve for x
    x = 136,692,424.97/13,180.42
  6. Step 6: Final answer
    x = 10,370.87

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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.