Home / 21,439.15-32,147.75-8,955.77

Finding the Fourth Proportional to 21,439.15, 32,147.75 and 8,955.77

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Solution

The fourth proportional to 21,439.15, 32,147.75 and 8,955.77 is: 13,429.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.15 : 32,147.75 = 8,955.77 : x
  2. Step 2: Convert to fraction form
    21,439.15/32,147.75 = 8,955.77/x
  3. Step 3: Cross multiply
    21,439.15x = 32,147.75 × 8,955.77
  4. Step 4: Simplify right side
    21,439.15x = 287,907,716.67
  5. Step 5: Solve for x
    x = 287,907,716.67/21,439.15
  6. Step 6: Final answer
    x = 13,429.07

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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.