Home / 13,321.50-19,971.91-8,631.60

Finding the Fourth Proportional to 13,321.50, 19,971.91 and 8,631.60

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Solution

The fourth proportional to 13,321.50, 19,971.91 and 8,631.60 is: 12,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.50 : 19,971.91 = 8,631.60 : x
  2. Step 2: Convert to fraction form
    13,321.50/19,971.91 = 8,631.60/x
  3. Step 3: Cross multiply
    13,321.50x = 19,971.91 × 8,631.60
  4. Step 4: Simplify right side
    13,321.50x = 172,389,538.36
  5. Step 5: Solve for x
    x = 172,389,538.36/13,321.50
  6. Step 6: Final answer
    x = 12,940.70

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1.5x scale

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.