Home / 12,811.78-19,222.80-6,236.20

Finding the Fourth Proportional to 12,811.78, 19,222.80 and 6,236.20

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Solution

The fourth proportional to 12,811.78, 19,222.80 and 6,236.20 is: 9,356.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.78 : 19,222.80 = 6,236.20 : x
  2. Step 2: Convert to fraction form
    12,811.78/19,222.80 = 6,236.20/x
  3. Step 3: Cross multiply
    12,811.78x = 19,222.80 × 6,236.20
  4. Step 4: Simplify right side
    12,811.78x = 119,877,225.36
  5. Step 5: Solve for x
    x = 119,877,225.36/12,811.78
  6. Step 6: Final answer
    x = 9,356.80

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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.