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Finding the Fourth Proportional to 15,792.27, 21,793.19 and 8,718.54

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Solution

The fourth proportional to 15,792.27, 21,793.19 and 8,718.54 is: 12,031.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792.27 : 21,793.19 = 8,718.54 : x
  2. Step 2: Convert to fraction form
    15,792.27/21,793.19 = 8,718.54/x
  3. Step 3: Cross multiply
    15,792.27x = 21,793.19 × 8,718.54
  4. Step 4: Simplify right side
    15,792.27x = 190,004,646.18
  5. Step 5: Solve for x
    x = 190,004,646.18/15,792.27
  6. Step 6: Final answer
    x = 12,031.50

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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.