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Finding the Fourth Proportional to 9,393.40, 12,961.99 and 5,615.81

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Solution

The fourth proportional to 9,393.40, 12,961.99 and 5,615.81 is: 7,749.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,393.40 : 12,961.99 = 5,615.81 : x
  2. Step 2: Convert to fraction form
    9,393.40/12,961.99 = 5,615.81/x
  3. Step 3: Cross multiply
    9,393.40x = 12,961.99 × 5,615.81
  4. Step 4: Simplify right side
    9,393.40x = 72,792,059.02
  5. Step 5: Solve for x
    x = 72,792,059.02/9,393.40
  6. Step 6: Final answer
    x = 7,749.28

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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.