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Finding the Fourth Proportional to 25,155, 34,705.06 and 15,086.70

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Solution

The fourth proportional to 25,155, 34,705.06 and 15,086.70 is: 20,814.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,155 : 34,705.06 = 15,086.70 : x
  2. Step 2: Convert to fraction form
    25,155/34,705.06 = 15,086.70/x
  3. Step 3: Cross multiply
    25,155x = 34,705.06 × 15,086.70
  4. Step 4: Simplify right side
    25,155x = 523,584,790.99
  5. Step 5: Solve for x
    x = 523,584,790.99/25,155
  6. Step 6: Final answer
    x = 20,814.34

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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.