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Finding the Fourth Proportional to 7,164.74, 9,879.36 and 4,643.54

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Solution

The fourth proportional to 7,164.74, 9,879.36 and 4,643.54 is: 6,402.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,164.74 : 9,879.36 = 4,643.54 : x
  2. Step 2: Convert to fraction form
    7,164.74/9,879.36 = 4,643.54/x
  3. Step 3: Cross multiply
    7,164.74x = 9,879.36 × 4,643.54
  4. Step 4: Simplify right side
    7,164.74x = 45,875,153.94
  5. Step 5: Solve for x
    x = 45,875,153.94/7,164.74
  6. Step 6: Final answer
    x = 6,402.91

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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.