Home / 10,989.20-15,157.76-7,015.28

Finding the Fourth Proportional to 10,989.20, 15,157.76 and 7,015.28

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Solution

The fourth proportional to 10,989.20, 15,157.76 and 7,015.28 is: 9,676.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.20 : 15,157.76 = 7,015.28 : x
  2. Step 2: Convert to fraction form
    10,989.20/15,157.76 = 7,015.28/x
  3. Step 3: Cross multiply
    10,989.20x = 15,157.76 × 7,015.28
  4. Step 4: Simplify right side
    10,989.20x = 106,335,930.57
  5. Step 5: Solve for x
    x = 106,335,930.57/10,989.20
  6. Step 6: Final answer
    x = 9,676.40

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