Home / 15,390.83-21,236.62-8,676.45

Finding the Fourth Proportional to 15,390.83, 21,236.62 and 8,676.45

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Solution

The fourth proportional to 15,390.83, 21,236.62 and 8,676.45 is: 11,971.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.83 : 21,236.62 = 8,676.45 : x
  2. Step 2: Convert to fraction form
    15,390.83/21,236.62 = 8,676.45/x
  3. Step 3: Cross multiply
    15,390.83x = 21,236.62 × 8,676.45
  4. Step 4: Simplify right side
    15,390.83x = 184,258,529.55
  5. Step 5: Solve for x
    x = 184,258,529.55/15,390.83
  6. Step 6: Final answer
    x = 11,971.97

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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.