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Finding the Fourth Proportional to 56,372.78, 84,549.72 and 18,928.64

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Solution

The fourth proportional to 56,372.78, 84,549.72 and 18,928.64 is: 28,389.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,372.78 : 84,549.72 = 18,928.64 : x
  2. Step 2: Convert to fraction form
    56,372.78/84,549.72 = 18,928.64/x
  3. Step 3: Cross multiply
    56,372.78x = 84,549.72 × 18,928.64
  4. Step 4: Simplify right side
    56,372.78x = 1,600,411,211.98
  5. Step 5: Solve for x
    x = 1,600,411,211.98/56,372.78
  6. Step 6: Final answer
    x = 28,389.79

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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.