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Finding the Fourth Proportional to 7,905.81, 10,905.03 and 5,070.20

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Solution

The fourth proportional to 7,905.81, 10,905.03 and 5,070.20 is: 6,993.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.81 : 10,905.03 = 5,070.20 : x
  2. Step 2: Convert to fraction form
    7,905.81/10,905.03 = 5,070.20/x
  3. Step 3: Cross multiply
    7,905.81x = 10,905.03 × 5,070.20
  4. Step 4: Simplify right side
    7,905.81x = 55,290,628.58
  5. Step 5: Solve for x
    x = 55,290,628.58/7,905.81
  6. Step 6: Final answer
    x = 6,993.67

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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.