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Finding the Fourth Proportional to 25,797.78, 38,666.70 and 21,125.70

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Solution

The fourth proportional to 25,797.78, 38,666.70 and 21,125.70 is: 31,664.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,797.78 : 38,666.70 = 21,125.70 : x
  2. Step 2: Convert to fraction form
    25,797.78/38,666.70 = 21,125.70/x
  3. Step 3: Cross multiply
    25,797.78x = 38,666.70 × 21,125.70
  4. Step 4: Simplify right side
    25,797.78x = 816,861,104.19
  5. Step 5: Solve for x
    x = 816,861,104.19/25,797.78
  6. Step 6: Final answer
    x = 31,664.01

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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.