Home / 19,620.78-29,431.20-11,827.80

Finding the Fourth Proportional to 19,620.78, 29,431.20 and 11,827.80

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Solution

The fourth proportional to 19,620.78, 29,431.20 and 11,827.80 is: 17,741.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,620.78 : 29,431.20 = 11,827.80 : x
  2. Step 2: Convert to fraction form
    19,620.78/29,431.20 = 11,827.80/x
  3. Step 3: Cross multiply
    19,620.78x = 29,431.20 × 11,827.80
  4. Step 4: Simplify right side
    19,620.78x = 348,106,347.36
  5. Step 5: Solve for x
    x = 348,106,347.36/19,620.78
  6. Step 6: Final answer
    x = 17,741.72

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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.