Home / 8,782.08-12,120.64-5,641.60

Finding the Fourth Proportional to 8,782.08, 12,120.64 and 5,641.60

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Solution

The fourth proportional to 8,782.08, 12,120.64 and 5,641.60 is: 7,786.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.08 : 12,120.64 = 5,641.60 : x
  2. Step 2: Convert to fraction form
    8,782.08/12,120.64 = 5,641.60/x
  3. Step 3: Cross multiply
    8,782.08x = 12,120.64 × 5,641.60
  4. Step 4: Simplify right side
    8,782.08x = 68,379,802.62
  5. Step 5: Solve for x
    x = 68,379,802.62/8,782.08
  6. Step 6: Final answer
    x = 7,786.29

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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.