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Finding the Fourth Proportional to 25,805.76, 38,708.70 and 7,086.05

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Solution

The fourth proportional to 25,805.76, 38,708.70 and 7,086.05 is: 10,629.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,805.76 : 38,708.70 = 7,086.05 : x
  2. Step 2: Convert to fraction form
    25,805.76/38,708.70 = 7,086.05/x
  3. Step 3: Cross multiply
    25,805.76x = 38,708.70 × 7,086.05
  4. Step 4: Simplify right side
    25,805.76x = 274,291,783.64
  5. Step 5: Solve for x
    x = 274,291,783.64/25,805.76
  6. Step 6: Final answer
    x = 10,629.09

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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.