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Finding the Fourth Proportional to 12,895.60, 19,321.80 and 8,510.80

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Solution

The fourth proportional to 12,895.60, 19,321.80 and 8,510.80 is: 12,751.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,895.60 : 19,321.80 = 8,510.80 : x
  2. Step 2: Convert to fraction form
    12,895.60/19,321.80 = 8,510.80/x
  3. Step 3: Cross multiply
    12,895.60x = 19,321.80 × 8,510.80
  4. Step 4: Simplify right side
    12,895.60x = 164,443,975.44
  5. Step 5: Solve for x
    x = 164,443,975.44/12,895.60
  6. Step 6: Final answer
    x = 12,751.94

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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.