Home / 8,421.57-11,621.75-4,644.74

Finding the Fourth Proportional to 8,421.57, 11,621.75 and 4,644.74

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Solution

The fourth proportional to 8,421.57, 11,621.75 and 4,644.74 is: 6,409.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.57 : 11,621.75 = 4,644.74 : x
  2. Step 2: Convert to fraction form
    8,421.57/11,621.75 = 4,644.74/x
  3. Step 3: Cross multiply
    8,421.57x = 11,621.75 × 4,644.74
  4. Step 4: Simplify right side
    8,421.57x = 53,980,012.93
  5. Step 5: Solve for x
    x = 53,980,012.93/8,421.57
  6. Step 6: Final answer
    x = 6,409.73

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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.