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Finding the Fourth Proportional to 40,509.94, 60,764.40 and 13,855.66

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Solution

The fourth proportional to 40,509.94, 60,764.40 and 13,855.66 is: 20,783.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,509.94 : 60,764.40 = 13,855.66 : x
  2. Step 2: Convert to fraction form
    40,509.94/60,764.40 = 13,855.66/x
  3. Step 3: Cross multiply
    40,509.94x = 60,764.40 × 13,855.66
  4. Step 4: Simplify right side
    40,509.94x = 841,930,866.50
  5. Step 5: Solve for x
    x = 841,930,866.50/40,509.94
  6. Step 6: Final answer
    x = 20,783.32

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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.