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Finding the Fourth Proportional to 12,940.80, 19,392.93 and 5,903.52

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Solution

The fourth proportional to 12,940.80, 19,392.93 and 5,903.52 is: 8,846.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.80 : 19,392.93 = 5,903.52 : x
  2. Step 2: Convert to fraction form
    12,940.80/19,392.93 = 5,903.52/x
  3. Step 3: Cross multiply
    12,940.80x = 19,392.93 × 5,903.52
  4. Step 4: Simplify right side
    12,940.80x = 114,486,550.11
  5. Step 5: Solve for x
    x = 114,486,550.11/12,940.80
  6. Step 6: Final answer
    x = 8,846.95

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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.