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Finding the Fourth Proportional to 40,698.52, 61,038.21 and 11,109.31

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Solution

The fourth proportional to 40,698.52, 61,038.21 and 11,109.31 is: 16,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,698.52 : 61,038.21 = 11,109.31 : x
  2. Step 2: Convert to fraction form
    40,698.52/61,038.21 = 11,109.31/x
  3. Step 3: Cross multiply
    40,698.52x = 61,038.21 × 11,109.31
  4. Step 4: Simplify right side
    40,698.52x = 678,092,396.74
  5. Step 5: Solve for x
    x = 678,092,396.74/40,698.52
  6. Step 6: Final answer
    x = 16,661.35

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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.