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Finding the Fourth Proportional to 10,989, 15,167.30 and 7,806.92

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Solution

The fourth proportional to 10,989, 15,167.30 and 7,806.92 is: 10,775.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989 : 15,167.30 = 7,806.92 : x
  2. Step 2: Convert to fraction form
    10,989/15,167.30 = 7,806.92/x
  3. Step 3: Cross multiply
    10,989x = 15,167.30 × 7,806.92
  4. Step 4: Simplify right side
    10,989x = 118,409,782.84
  5. Step 5: Solve for x
    x = 118,409,782.84/10,989
  6. Step 6: Final answer
    x = 10,775.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.