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Finding the Fourth Proportional to 28,163, 38,864.94 and 15,588.56

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Solution

The fourth proportional to 28,163, 38,864.94 and 15,588.56 is: 21,512.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163 : 38,864.94 = 15,588.56 : x
  2. Step 2: Convert to fraction form
    28,163/38,864.94 = 15,588.56/x
  3. Step 3: Cross multiply
    28,163x = 38,864.94 × 15,588.56
  4. Step 4: Simplify right side
    28,163x = 605,848,449.09
  5. Step 5: Solve for x
    x = 605,848,449.09/28,163
  6. Step 6: Final answer
    x = 21,512.21

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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.