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Finding the Fourth Proportional to 28,571.84, 42,859.76 and 8,847.84

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Solution

The fourth proportional to 28,571.84, 42,859.76 and 8,847.84 is: 13,272.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.84 : 42,859.76 = 8,847.84 : x
  2. Step 2: Convert to fraction form
    28,571.84/42,859.76 = 8,847.84/x
  3. Step 3: Cross multiply
    28,571.84x = 42,859.76 × 8,847.84
  4. Step 4: Simplify right side
    28,571.84x = 379,216,298.92
  5. Step 5: Solve for x
    x = 379,216,298.92/28,571.84
  6. Step 6: Final answer
    x = 13,272.38

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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.