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Finding the Fourth Proportional to 40,894.99, 61,342.41 and 12,817.20

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Solution

The fourth proportional to 40,894.99, 61,342.41 and 12,817.20 is: 19,225.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,894.99 : 61,342.41 = 12,817.20 : x
  2. Step 2: Convert to fraction form
    40,894.99/61,342.41 = 12,817.20/x
  3. Step 3: Cross multiply
    40,894.99x = 61,342.41 × 12,817.20
  4. Step 4: Simplify right side
    40,894.99x = 786,237,937.45
  5. Step 5: Solve for x
    x = 786,237,937.45/40,894.99
  6. Step 6: Final answer
    x = 19,225.78

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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.