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Finding the Fourth Proportional to 15,792.51, 21,794.49 and 9,078.77

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Solution

The fourth proportional to 15,792.51, 21,794.49 and 9,078.77 is: 12,529.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792.51 : 21,794.49 = 9,078.77 : x
  2. Step 2: Convert to fraction form
    15,792.51/21,794.49 = 9,078.77/x
  3. Step 3: Cross multiply
    15,792.51x = 21,794.49 × 9,078.77
  4. Step 4: Simplify right side
    15,792.51x = 197,867,216.46
  5. Step 5: Solve for x
    x = 197,867,216.46/15,792.51
  6. Step 6: Final answer
    x = 12,529.18

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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.