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Finding the Fourth Proportional to 15,790.72, 21,883.36 and 15,568

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Solution

The fourth proportional to 15,790.72, 21,883.36 and 15,568 is: 21,574.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.72 : 21,883.36 = 15,568 : x
  2. Step 2: Convert to fraction form
    15,790.72/21,883.36 = 15,568/x
  3. Step 3: Cross multiply
    15,790.72x = 21,883.36 × 15,568
  4. Step 4: Simplify right side
    15,790.72x = 340,680,148.48
  5. Step 5: Solve for x
    x = 340,680,148.48/15,790.72
  6. Step 6: Final answer
    x = 21,574.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.