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Finding the Fourth Proportional to 19,955.76, 29,939 and 17,779.44

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Solution

The fourth proportional to 19,955.76, 29,939 and 17,779.44 is: 26,673.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,955.76 : 29,939 = 17,779.44 : x
  2. Step 2: Convert to fraction form
    19,955.76/29,939 = 17,779.44/x
  3. Step 3: Cross multiply
    19,955.76x = 29,939 × 17,779.44
  4. Step 4: Simplify right side
    19,955.76x = 532,298,654.16
  5. Step 5: Solve for x
    x = 532,298,654.16/19,955.76
  6. Step 6: Final answer
    x = 26,673.94

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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.