Home / 15,393.21-21,242.39-8,678.85

Finding the Fourth Proportional to 15,393.21, 21,242.39 and 8,678.85

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Solution

The fourth proportional to 15,393.21, 21,242.39 and 8,678.85 is: 11,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,393.21 : 21,242.39 = 8,678.85 : x
  2. Step 2: Convert to fraction form
    15,393.21/21,242.39 = 8,678.85/x
  3. Step 3: Cross multiply
    15,393.21x = 21,242.39 × 8,678.85
  4. Step 4: Simplify right side
    15,393.21x = 184,359,473.06
  5. Step 5: Solve for x
    x = 184,359,473.06/15,393.21
  6. Step 6: Final answer
    x = 11,976.67

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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.