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Finding the Fourth Proportional to 13,992.71, 19,308.95 and 7,943.07

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Solution

The fourth proportional to 13,992.71, 19,308.95 and 7,943.07 is: 10,960.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.71 : 19,308.95 = 7,943.07 : x
  2. Step 2: Convert to fraction form
    13,992.71/19,308.95 = 7,943.07/x
  3. Step 3: Cross multiply
    13,992.71x = 19,308.95 × 7,943.07
  4. Step 4: Simplify right side
    13,992.71x = 153,372,361.33
  5. Step 5: Solve for x
    x = 153,372,361.33/13,992.71
  6. Step 6: Final answer
    x = 10,960.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.