Home / 8,421.44-11,621.63-4,644.74

Finding the Fourth Proportional to 8,421.44, 11,621.63 and 4,644.74

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Solution

The fourth proportional to 8,421.44, 11,621.63 and 4,644.74 is: 6,409.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.44 : 11,621.63 = 4,644.74 : x
  2. Step 2: Convert to fraction form
    8,421.44/11,621.63 = 4,644.74/x
  3. Step 3: Cross multiply
    8,421.44x = 11,621.63 × 4,644.74
  4. Step 4: Simplify right side
    8,421.44x = 53,979,368.39
  5. Step 5: Solve for x
    x = 53,979,368.39/8,421.44
  6. Step 6: Final answer
    x = 6,409.76

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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.