Home / 11,458.20-15,811.48-6,421.72

Finding the Fourth Proportional to 11,458.20, 15,811.48 and 6,421.72

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Solution

The fourth proportional to 11,458.20, 15,811.48 and 6,421.72 is: 8,861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,458.20 : 15,811.48 = 6,421.72 : x
  2. Step 2: Convert to fraction form
    11,458.20/15,811.48 = 6,421.72/x
  3. Step 3: Cross multiply
    11,458.20x = 15,811.48 × 6,421.72
  4. Step 4: Simplify right side
    11,458.20x = 101,536,897.35
  5. Step 5: Solve for x
    x = 101,536,897.35/11,458.20
  6. Step 6: Final answer
    x = 8,861.51

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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.