Home / 8,421.18-11,621.41-4,644.46

Finding the Fourth Proportional to 8,421.18, 11,621.41 and 4,644.46

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Solution

The fourth proportional to 8,421.18, 11,621.41 and 4,644.46 is: 6,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.18 : 11,621.41 = 4,644.46 : x
  2. Step 2: Convert to fraction form
    8,421.18/11,621.41 = 4,644.46/x
  3. Step 3: Cross multiply
    8,421.18x = 11,621.41 × 4,644.46
  4. Step 4: Simplify right side
    8,421.18x = 53,975,115.78
  5. Step 5: Solve for x
    x = 53,975,115.78/8,421.18
  6. Step 6: Final answer
    x = 6,409.45

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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.