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Finding the Fourth Proportional to 9,999.63, 15,003.82 and 4,738.40

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Solution

The fourth proportional to 9,999.63, 15,003.82 and 4,738.40 is: 7,109.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.63 : 15,003.82 = 4,738.40 : x
  2. Step 2: Convert to fraction form
    9,999.63/15,003.82 = 4,738.40/x
  3. Step 3: Cross multiply
    9,999.63x = 15,003.82 × 4,738.40
  4. Step 4: Simplify right side
    9,999.63x = 71,094,087.86
  5. Step 5: Solve for x
    x = 71,094,087.86/9,999.63
  6. Step 6: Final answer
    x = 7,109.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.