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Finding the Fourth Proportional to 30,751.55, 42,456.74 and 25,099.77

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Solution

The fourth proportional to 30,751.55, 42,456.74 and 25,099.77 is: 34,653.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,751.55 : 42,456.74 = 25,099.77 : x
  2. Step 2: Convert to fraction form
    30,751.55/42,456.74 = 25,099.77/x
  3. Step 3: Cross multiply
    30,751.55x = 42,456.74 × 25,099.77
  4. Step 4: Simplify right side
    30,751.55x = 1,065,654,583.85
  5. Step 5: Solve for x
    x = 1,065,654,583.85/30,751.55
  6. Step 6: Final answer
    x = 34,653.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.