Home / 30,571.35-42,188.43-18,634.65

Finding the Fourth Proportional to 30,571.35, 42,188.43 and 18,634.65

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Solution

The fourth proportional to 30,571.35, 42,188.43 and 18,634.65 is: 25,715.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,571.35 : 42,188.43 = 18,634.65 : x
  2. Step 2: Convert to fraction form
    30,571.35/42,188.43 = 18,634.65/x
  3. Step 3: Cross multiply
    30,571.35x = 42,188.43 × 18,634.65
  4. Step 4: Simplify right side
    30,571.35x = 786,166,627.10
  5. Step 5: Solve for x
    x = 786,166,627.10/30,571.35
  6. Step 6: Final answer
    x = 25,715.80

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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.