Home / 15,516.75-21,409.38-9,143.60

Finding the Fourth Proportional to 15,516.75, 21,409.38 and 9,143.60

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Solution

The fourth proportional to 15,516.75, 21,409.38 and 9,143.60 is: 12,615.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,516.75 : 21,409.38 = 9,143.60 : x
  2. Step 2: Convert to fraction form
    15,516.75/21,409.38 = 9,143.60/x
  3. Step 3: Cross multiply
    15,516.75x = 21,409.38 × 9,143.60
  4. Step 4: Simplify right side
    15,516.75x = 195,758,820.35
  5. Step 5: Solve for x
    x = 195,758,820.35/15,516.75
  6. Step 6: Final answer
    x = 12,615.97

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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.