Home / 20,985.48-31,466.71-8,322.41

Finding the Fourth Proportional to 20,985.48, 31,466.71 and 8,322.41

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Solution

The fourth proportional to 20,985.48, 31,466.71 and 8,322.41 is: 12,479.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.48 : 31,466.71 = 8,322.41 : x
  2. Step 2: Convert to fraction form
    20,985.48/31,466.71 = 8,322.41/x
  3. Step 3: Cross multiply
    20,985.48x = 31,466.71 × 8,322.41
  4. Step 4: Simplify right side
    20,985.48x = 261,878,861.97
  5. Step 5: Solve for x
    x = 261,878,861.97/20,985.48
  6. Step 6: Final answer
    x = 12,479.05

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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.