Home / 12,887.20-19,330.80-8,912.80

Finding the Fourth Proportional to 12,887.20, 19,330.80 and 8,912.80

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Solution

The fourth proportional to 12,887.20, 19,330.80 and 8,912.80 is: 13,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.20 : 19,330.80 = 8,912.80 : x
  2. Step 2: Convert to fraction form
    12,887.20/19,330.80 = 8,912.80/x
  3. Step 3: Cross multiply
    12,887.20x = 19,330.80 × 8,912.80
  4. Step 4: Simplify right side
    12,887.20x = 172,291,554.24
  5. Step 5: Solve for x
    x = 172,291,554.24/12,887.20
  6. Step 6: Final answer
    x = 13,369.20

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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.