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Finding the Fourth Proportional to 25,969.01, 38,962.78 and 8,438.90

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Solution

The fourth proportional to 25,969.01, 38,962.78 and 8,438.90 is: 12,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,969.01 : 38,962.78 = 8,438.90 : x
  2. Step 2: Convert to fraction form
    25,969.01/38,962.78 = 8,438.90/x
  3. Step 3: Cross multiply
    25,969.01x = 38,962.78 × 8,438.90
  4. Step 4: Simplify right side
    25,969.01x = 328,802,788.23
  5. Step 5: Solve for x
    x = 328,802,788.23/25,969.01
  6. Step 6: Final answer
    x = 12,661.35

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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.