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Finding the Fourth Proportional to 7,210.31, 9,945.09 and 4,687.74

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Solution

The fourth proportional to 7,210.31, 9,945.09 and 4,687.74 is: 6,465.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,210.31 : 9,945.09 = 4,687.74 : x
  2. Step 2: Convert to fraction form
    7,210.31/9,945.09 = 4,687.74/x
  3. Step 3: Cross multiply
    7,210.31x = 9,945.09 × 4,687.74
  4. Step 4: Simplify right side
    7,210.31x = 46,619,996.20
  5. Step 5: Solve for x
    x = 46,619,996.20/7,210.31
  6. Step 6: Final answer
    x = 6,465.75

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1.5x scale

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.