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Finding the Fourth Proportional to 13,192.80, 19,792.92 and 5,407.20

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Solution

The fourth proportional to 13,192.80, 19,792.92 and 5,407.20 is: 8,112.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,192.80 : 19,792.92 = 5,407.20 : x
  2. Step 2: Convert to fraction form
    13,192.80/19,792.92 = 5,407.20/x
  3. Step 3: Cross multiply
    13,192.80x = 19,792.92 × 5,407.20
  4. Step 4: Simplify right side
    13,192.80x = 107,024,277.02
  5. Step 5: Solve for x
    x = 107,024,277.02/13,192.80
  6. Step 6: Final answer
    x = 8,112.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.