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Finding the Fourth Proportional to 7,879.55, 10,858.81 and 5,637.54

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Solution

The fourth proportional to 7,879.55, 10,858.81 and 5,637.54 is: 7,769.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.55 : 10,858.81 = 5,637.54 : x
  2. Step 2: Convert to fraction form
    7,879.55/10,858.81 = 5,637.54/x
  3. Step 3: Cross multiply
    7,879.55x = 10,858.81 × 5,637.54
  4. Step 4: Simplify right side
    7,879.55x = 61,216,962.67
  5. Step 5: Solve for x
    x = 61,216,962.67/7,879.55
  6. Step 6: Final answer
    x = 7,769.09

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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.