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Finding the Fourth Proportional to 25,776.84, 38,712.78 and 15,940.20

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Solution

The fourth proportional to 25,776.84, 38,712.78 and 15,940.20 is: 23,939.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,776.84 : 38,712.78 = 15,940.20 : x
  2. Step 2: Convert to fraction form
    25,776.84/38,712.78 = 15,940.20/x
  3. Step 3: Cross multiply
    25,776.84x = 38,712.78 × 15,940.20
  4. Step 4: Simplify right side
    25,776.84x = 617,089,455.76
  5. Step 5: Solve for x
    x = 617,089,455.76/25,776.84
  6. Step 6: Final answer
    x = 23,939.69

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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.