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Finding the Fourth Proportional to 28,437, 42,571.23 and 21,074.49

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Solution

The fourth proportional to 28,437, 42,571.23 and 21,074.49 is: 31,549.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437 : 42,571.23 = 21,074.49 : x
  2. Step 2: Convert to fraction form
    28,437/42,571.23 = 21,074.49/x
  3. Step 3: Cross multiply
    28,437x = 42,571.23 × 21,074.49
  4. Step 4: Simplify right side
    28,437x = 897,166,960.92
  5. Step 5: Solve for x
    x = 897,166,960.92/28,437
  6. Step 6: Final answer
    x = 31,549.28

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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.