Home / 13,779.78-20,662.29-5,459.46

Finding the Fourth Proportional to 13,779.78, 20,662.29 and 5,459.46

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Solution

The fourth proportional to 13,779.78, 20,662.29 and 5,459.46 is: 8,186.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.78 : 20,662.29 = 5,459.46 : x
  2. Step 2: Convert to fraction form
    13,779.78/20,662.29 = 5,459.46/x
  3. Step 3: Cross multiply
    13,779.78x = 20,662.29 × 5,459.46
  4. Step 4: Simplify right side
    13,779.78x = 112,804,945.76
  5. Step 5: Solve for x
    x = 112,804,945.76/13,779.78
  6. Step 6: Final answer
    x = 8,186.27

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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.