Home / 8,421.38-11,621.34-4,644.89

Finding the Fourth Proportional to 8,421.38, 11,621.34 and 4,644.89

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Solution

The fourth proportional to 8,421.38, 11,621.34 and 4,644.89 is: 6,409.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.38 : 11,621.34 = 4,644.89 : x
  2. Step 2: Convert to fraction form
    8,421.38/11,621.34 = 4,644.89/x
  3. Step 3: Cross multiply
    8,421.38x = 11,621.34 × 4,644.89
  4. Step 4: Simplify right side
    8,421.38x = 53,979,875.01
  5. Step 5: Solve for x
    x = 53,979,875.01/8,421.38
  6. Step 6: Final answer
    x = 6,409.86

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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.