Home / 11,455.41-15,809.12-6,421.28

Finding the Fourth Proportional to 11,455.41, 15,809.12 and 6,421.28

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Solution

The fourth proportional to 11,455.41, 15,809.12 and 6,421.28 is: 8,861.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,455.41 : 15,809.12 = 6,421.28 : x
  2. Step 2: Convert to fraction form
    11,455.41/15,809.12 = 6,421.28/x
  3. Step 3: Cross multiply
    11,455.41x = 15,809.12 × 6,421.28
  4. Step 4: Simplify right side
    11,455.41x = 101,514,735.12
  5. Step 5: Solve for x
    x = 101,514,735.12/11,455.41
  6. Step 6: Final answer
    x = 8,861.73

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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.