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Finding the Fourth Proportional to 13,218.74, 19,801.95 and 9,935.54

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Solution

The fourth proportional to 13,218.74, 19,801.95 and 9,935.54 is: 14,883.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.74 : 19,801.95 = 9,935.54 : x
  2. Step 2: Convert to fraction form
    13,218.74/19,801.95 = 9,935.54/x
  3. Step 3: Cross multiply
    13,218.74x = 19,801.95 × 9,935.54
  4. Step 4: Simplify right side
    13,218.74x = 196,743,066.30
  5. Step 5: Solve for x
    x = 196,743,066.30/13,218.74
  6. Step 6: Final answer
    x = 14,883.65

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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.