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Finding the Fourth Proportional to 25,603.75, 38,405.65 and 7,135.75

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Solution

The fourth proportional to 25,603.75, 38,405.65 and 7,135.75 is: 10,703.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,603.75 : 38,405.65 = 7,135.75 : x
  2. Step 2: Convert to fraction form
    25,603.75/38,405.65 = 7,135.75/x
  3. Step 3: Cross multiply
    25,603.75x = 38,405.65 × 7,135.75
  4. Step 4: Simplify right side
    25,603.75x = 274,053,116.99
  5. Step 5: Solve for x
    x = 274,053,116.99/25,603.75
  6. Step 6: Final answer
    x = 10,703.63

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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.