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Finding the Fourth Proportional to 15,792.32, 21,793.02 and 8,718.68

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Solution

The fourth proportional to 15,792.32, 21,793.02 and 8,718.68 is: 12,031.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792.32 : 21,793.02 = 8,718.68 : x
  2. Step 2: Convert to fraction form
    15,792.32/21,793.02 = 8,718.68/x
  3. Step 3: Cross multiply
    15,792.32x = 21,793.02 × 8,718.68
  4. Step 4: Simplify right side
    15,792.32x = 190,006,367.61
  5. Step 5: Solve for x
    x = 190,006,367.61/15,792.32
  6. Step 6: Final answer
    x = 12,031.57

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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.