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Finding the Fourth Proportional to 13,292.80, 19,940.64 and 4,976.80

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Solution

The fourth proportional to 13,292.80, 19,940.64 and 4,976.80 is: 7,465.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,292.80 : 19,940.64 = 4,976.80 : x
  2. Step 2: Convert to fraction form
    13,292.80/19,940.64 = 4,976.80/x
  3. Step 3: Cross multiply
    13,292.80x = 19,940.64 × 4,976.80
  4. Step 4: Simplify right side
    13,292.80x = 99,240,577.15
  5. Step 5: Solve for x
    x = 99,240,577.15/13,292.80
  6. Step 6: Final answer
    x = 7,465.74

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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.