Home / 7,828.65-11,743.40-1,985.31

Finding the Fourth Proportional to 7,828.65, 11,743.40 and 1,985.31

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Solution

The fourth proportional to 7,828.65, 11,743.40 and 1,985.31 is: 2,978.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,828.65 : 11,743.40 = 1,985.31 : x
  2. Step 2: Convert to fraction form
    7,828.65/11,743.40 = 1,985.31/x
  3. Step 3: Cross multiply
    7,828.65x = 11,743.40 × 1,985.31
  4. Step 4: Simplify right side
    7,828.65x = 23,314,289.45
  5. Step 5: Solve for x
    x = 23,314,289.45/7,828.65
  6. Step 6: Final answer
    x = 2,978.07

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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.