Home / 8,421.35-11,621.19-4,644.68

Finding the Fourth Proportional to 8,421.35, 11,621.19 and 4,644.68

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Solution

The fourth proportional to 8,421.35, 11,621.19 and 4,644.68 is: 6,409.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.35 : 11,621.19 = 4,644.68 : x
  2. Step 2: Convert to fraction form
    8,421.35/11,621.19 = 4,644.68/x
  3. Step 3: Cross multiply
    8,421.35x = 11,621.19 × 4,644.68
  4. Step 4: Simplify right side
    8,421.35x = 53,976,650.66
  5. Step 5: Solve for x
    x = 53,976,650.66/8,421.35
  6. Step 6: Final answer
    x = 6,409.50

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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.