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Finding the Fourth Proportional to 13,671.41, 18,866.21 and 7,929.88

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Solution

The fourth proportional to 13,671.41, 18,866.21 and 7,929.88 is: 10,943.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.41 : 18,866.21 = 7,929.88 : x
  2. Step 2: Convert to fraction form
    13,671.41/18,866.21 = 7,929.88/x
  3. Step 3: Cross multiply
    13,671.41x = 18,866.21 × 7,929.88
  4. Step 4: Simplify right side
    13,671.41x = 149,606,804.65
  5. Step 5: Solve for x
    x = 149,606,804.65/13,671.41
  6. Step 6: Final answer
    x = 10,943.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.