Home / 8,420.77-11,621.33-4,644.28

Finding the Fourth Proportional to 8,420.77, 11,621.33 and 4,644.28

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Solution

The fourth proportional to 8,420.77, 11,621.33 and 4,644.28 is: 6,409.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.77 : 11,621.33 = 4,644.28 : x
  2. Step 2: Convert to fraction form
    8,420.77/11,621.33 = 4,644.28/x
  3. Step 3: Cross multiply
    8,420.77x = 11,621.33 × 4,644.28
  4. Step 4: Simplify right side
    8,420.77x = 53,972,710.49
  5. Step 5: Solve for x
    x = 53,972,710.49/8,420.77
  6. Step 6: Final answer
    x = 6,409.47

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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.