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Finding the Fourth Proportional to 15,792, 21,791.93 and 8,718.36

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Solution

The fourth proportional to 15,792, 21,791.93 and 8,718.36 is: 12,030.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792 : 21,791.93 = 8,718.36 : x
  2. Step 2: Convert to fraction form
    15,792/21,791.93 = 8,718.36/x
  3. Step 3: Cross multiply
    15,792x = 21,791.93 × 8,718.36
  4. Step 4: Simplify right side
    15,792x = 189,989,847.24
  5. Step 5: Solve for x
    x = 189,989,847.24/15,792
  6. Step 6: Final answer
    x = 12,030.77

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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.