Home / 19,985.67-29,978.48-5,945.65

Finding the Fourth Proportional to 19,985.67, 29,978.48 and 5,945.65

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Solution

The fourth proportional to 19,985.67, 29,978.48 and 5,945.65 is: 8,918.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,985.67 : 29,978.48 = 5,945.65 : x
  2. Step 2: Convert to fraction form
    19,985.67/29,978.48 = 5,945.65/x
  3. Step 3: Cross multiply
    19,985.67x = 29,978.48 × 5,945.65
  4. Step 4: Simplify right side
    19,985.67x = 178,241,489.53
  5. Step 5: Solve for x
    x = 178,241,489.53/19,985.67
  6. Step 6: Final answer
    x = 8,918.46

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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.