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Finding the Fourth Proportional to 40,892.99, 61,339.41 and 12,815.20

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Solution

The fourth proportional to 40,892.99, 61,339.41 and 12,815.20 is: 19,222.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,892.99 : 61,339.41 = 12,815.20 : x
  2. Step 2: Convert to fraction form
    40,892.99/61,339.41 = 12,815.20/x
  3. Step 3: Cross multiply
    40,892.99x = 61,339.41 × 12,815.20
  4. Step 4: Simplify right side
    40,892.99x = 786,076,500.33
  5. Step 5: Solve for x
    x = 786,076,500.33/40,892.99
  6. Step 6: Final answer
    x = 19,222.77

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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.