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Finding the Fourth Proportional to 13,151.16, 19,728.90 and 4,388.76

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Solution

The fourth proportional to 13,151.16, 19,728.90 and 4,388.76 is: 6,583.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.16 : 19,728.90 = 4,388.76 : x
  2. Step 2: Convert to fraction form
    13,151.16/19,728.90 = 4,388.76/x
  3. Step 3: Cross multiply
    13,151.16x = 19,728.90 × 4,388.76
  4. Step 4: Simplify right side
    13,151.16x = 86,585,407.16
  5. Step 5: Solve for x
    x = 86,585,407.16/13,151.16
  6. Step 6: Final answer
    x = 6,583.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.