Home / 28,153.76-42,231.72-12,571.52

Finding the Fourth Proportional to 28,153.76, 42,231.72 and 12,571.52

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Solution

The fourth proportional to 28,153.76, 42,231.72 and 12,571.52 is: 18,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,153.76 : 42,231.72 = 12,571.52 : x
  2. Step 2: Convert to fraction form
    28,153.76/42,231.72 = 12,571.52/x
  3. Step 3: Cross multiply
    28,153.76x = 42,231.72 × 12,571.52
  4. Step 4: Simplify right side
    28,153.76x = 530,916,912.61
  5. Step 5: Solve for x
    x = 530,916,912.61/28,153.76
  6. Step 6: Final answer
    x = 18,857.76

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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.