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Finding the Fourth Proportional to 7,155.47, 9,875.12 and 3,969.07

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Solution

The fourth proportional to 7,155.47, 9,875.12 and 3,969.07 is: 5,477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.47 : 9,875.12 = 3,969.07 : x
  2. Step 2: Convert to fraction form
    7,155.47/9,875.12 = 3,969.07/x
  3. Step 3: Cross multiply
    7,155.47x = 9,875.12 × 3,969.07
  4. Step 4: Simplify right side
    7,155.47x = 39,194,998.01
  5. Step 5: Solve for x
    x = 39,194,998.01/7,155.47
  6. Step 6: Final answer
    x = 5,477.63

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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.