Home / 7,918.89-11,865.83-6,430.87

Finding the Fourth Proportional to 7,918.89, 11,865.83 and 6,430.87

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Solution

The fourth proportional to 7,918.89, 11,865.83 and 6,430.87 is: 9,636.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,918.89 : 11,865.83 = 6,430.87 : x
  2. Step 2: Convert to fraction form
    7,918.89/11,865.83 = 6,430.87/x
  3. Step 3: Cross multiply
    7,918.89x = 11,865.83 × 6,430.87
  4. Step 4: Simplify right side
    7,918.89x = 76,307,610.17
  5. Step 5: Solve for x
    x = 76,307,610.17/7,918.89
  6. Step 6: Final answer
    x = 9,636.15

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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.