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Finding the Fourth Proportional to 13,891.86, 19,170.54 and 7,923.51

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Solution

The fourth proportional to 13,891.86, 19,170.54 and 7,923.51 is: 10,934.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.86 : 19,170.54 = 7,923.51 : x
  2. Step 2: Convert to fraction form
    13,891.86/19,170.54 = 7,923.51/x
  3. Step 3: Cross multiply
    13,891.86x = 19,170.54 × 7,923.51
  4. Step 4: Simplify right side
    13,891.86x = 151,897,965.40
  5. Step 5: Solve for x
    x = 151,897,965.40/13,891.86
  6. Step 6: Final answer
    x = 10,934.31

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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.