Home / 7,720.29-11,580.40-1,876.91

Finding the Fourth Proportional to 7,720.29, 11,580.40 and 1,876.91

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Solution

The fourth proportional to 7,720.29, 11,580.40 and 1,876.91 is: 2,815.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.29 : 11,580.40 = 1,876.91 : x
  2. Step 2: Convert to fraction form
    7,720.29/11,580.40 = 1,876.91/x
  3. Step 3: Cross multiply
    7,720.29x = 11,580.40 × 1,876.91
  4. Step 4: Simplify right side
    7,720.29x = 21,735,368.56
  5. Step 5: Solve for x
    x = 21,735,368.56/7,720.29
  6. Step 6: Final answer
    x = 2,815.36

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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.