Home / 9,738.40-13,440.72-6,381.76

Finding the Fourth Proportional to 9,738.40, 13,440.72 and 6,381.76

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Solution

The fourth proportional to 9,738.40, 13,440.72 and 6,381.76 is: 8,807.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,738.40 : 13,440.72 = 6,381.76 : x
  2. Step 2: Convert to fraction form
    9,738.40/13,440.72 = 6,381.76/x
  3. Step 3: Cross multiply
    9,738.40x = 13,440.72 × 6,381.76
  4. Step 4: Simplify right side
    9,738.40x = 85,775,449.27
  5. Step 5: Solve for x
    x = 85,775,449.27/9,738.40
  6. Step 6: Final answer
    x = 8,807.96

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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.