Home / 13,153.76-18,151.92-7,185.20

Finding the Fourth Proportional to 13,153.76, 18,151.92 and 7,185.20

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Solution

The fourth proportional to 13,153.76, 18,151.92 and 7,185.20 is: 9,915.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,153.76 : 18,151.92 = 7,185.20 : x
  2. Step 2: Convert to fraction form
    13,153.76/18,151.92 = 7,185.20/x
  3. Step 3: Cross multiply
    13,153.76x = 18,151.92 × 7,185.20
  4. Step 4: Simplify right side
    13,153.76x = 130,425,175.58
  5. Step 5: Solve for x
    x = 130,425,175.58/13,153.76
  6. Step 6: Final answer
    x = 9,915.43

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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.