Home / 45,405.28-68,090.64-20,764

Finding the Fourth Proportional to 45,405.28, 68,090.64 and 20,764

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Solution

The fourth proportional to 45,405.28, 68,090.64 and 20,764 is: 31,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,405.28 : 68,090.64 = 20,764 : x
  2. Step 2: Convert to fraction form
    45,405.28/68,090.64 = 20,764/x
  3. Step 3: Cross multiply
    45,405.28x = 68,090.64 × 20,764
  4. Step 4: Simplify right side
    45,405.28x = 1,413,834,048.96
  5. Step 5: Solve for x
    x = 1,413,834,048.96/45,405.28
  6. Step 6: Final answer
    x = 31,138.10

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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.