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Finding the Fourth Proportional to 12,908.97, 19,365.49 and 5,513.47

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Solution

The fourth proportional to 12,908.97, 19,365.49 and 5,513.47 is: 8,271.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.97 : 19,365.49 = 5,513.47 : x
  2. Step 2: Convert to fraction form
    12,908.97/19,365.49 = 5,513.47/x
  3. Step 3: Cross multiply
    12,908.97x = 19,365.49 × 5,513.47
  4. Step 4: Simplify right side
    12,908.97x = 106,771,020.58
  5. Step 5: Solve for x
    x = 106,771,020.58/12,908.97
  6. Step 6: Final answer
    x = 8,271.07

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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.