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Finding the Fourth Proportional to 15,792.50, 21,792.62 and 8,718.86

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Solution

The fourth proportional to 15,792.50, 21,792.62 and 8,718.86 is: 12,031.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792.50 : 21,792.62 = 8,718.86 : x
  2. Step 2: Convert to fraction form
    15,792.50/21,792.62 = 8,718.86/x
  3. Step 3: Cross multiply
    15,792.50x = 21,792.62 × 8,718.86
  4. Step 4: Simplify right side
    15,792.50x = 190,006,802.81
  5. Step 5: Solve for x
    x = 190,006,802.81/15,792.50
  6. Step 6: Final answer
    x = 12,031.46

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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.