Home / 8,420.98-11,621.46-4,644.13

Finding the Fourth Proportional to 8,420.98, 11,621.46 and 4,644.13

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Solution

The fourth proportional to 8,420.98, 11,621.46 and 4,644.13 is: 6,409.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.98 : 11,621.46 = 4,644.13 : x
  2. Step 2: Convert to fraction form
    8,420.98/11,621.46 = 4,644.13/x
  3. Step 3: Cross multiply
    8,420.98x = 11,621.46 × 4,644.13
  4. Step 4: Simplify right side
    8,420.98x = 53,971,571.03
  5. Step 5: Solve for x
    x = 53,971,571.03/8,420.98
  6. Step 6: Final answer
    x = 6,409.18

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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.