Home / 19,985.80-29,978.94-5,945.50

Finding the Fourth Proportional to 19,985.80, 29,978.94 and 5,945.50

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Solution

The fourth proportional to 19,985.80, 29,978.94 and 5,945.50 is: 8,918.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,985.80 : 29,978.94 = 5,945.50 : x
  2. Step 2: Convert to fraction form
    19,985.80/29,978.94 = 5,945.50/x
  3. Step 3: Cross multiply
    19,985.80x = 29,978.94 × 5,945.50
  4. Step 4: Simplify right side
    19,985.80x = 178,239,787.77
  5. Step 5: Solve for x
    x = 178,239,787.77/19,985.80
  6. Step 6: Final answer
    x = 8,918.32

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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.