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Finding the Fourth Proportional to 25,404.40, 38,106.60 and 21,905.20

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Solution

The fourth proportional to 25,404.40, 38,106.60 and 21,905.20 is: 32,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,404.40 : 38,106.60 = 21,905.20 : x
  2. Step 2: Convert to fraction form
    25,404.40/38,106.60 = 21,905.20/x
  3. Step 3: Cross multiply
    25,404.40x = 38,106.60 × 21,905.20
  4. Step 4: Simplify right side
    25,404.40x = 834,732,694.32
  5. Step 5: Solve for x
    x = 834,732,694.32/25,404.40
  6. Step 6: Final answer
    x = 32,857.80

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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.