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Finding the Fourth Proportional to 30,474.59, 42,015.74 and 25,369.74

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Solution

The fourth proportional to 30,474.59, 42,015.74 and 25,369.74 is: 34,977.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,474.59 : 42,015.74 = 25,369.74 : x
  2. Step 2: Convert to fraction form
    30,474.59/42,015.74 = 25,369.74/x
  3. Step 3: Cross multiply
    30,474.59x = 42,015.74 × 25,369.74
  4. Step 4: Simplify right side
    30,474.59x = 1,065,928,272.86
  5. Step 5: Solve for x
    x = 1,065,928,272.86/30,474.59
  6. Step 6: Final answer
    x = 34,977.61

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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.