Home / 12,939.40-19,409.10-4,180.33

Finding the Fourth Proportional to 12,939.40, 19,409.10 and 4,180.33

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Solution

The fourth proportional to 12,939.40, 19,409.10 and 4,180.33 is: 6,270.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.40 : 19,409.10 = 4,180.33 : x
  2. Step 2: Convert to fraction form
    12,939.40/19,409.10 = 4,180.33/x
  3. Step 3: Cross multiply
    12,939.40x = 19,409.10 × 4,180.33
  4. Step 4: Simplify right side
    12,939.40x = 81,136,443.00
  5. Step 5: Solve for x
    x = 81,136,443.00/12,939.40
  6. Step 6: Final answer
    x = 6,270.50

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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.