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Finding the Fourth Proportional to 7,768.63, 10,720.79 and 4,624.21

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Solution

The fourth proportional to 7,768.63, 10,720.79 and 4,624.21 is: 6,381.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.63 : 10,720.79 = 4,624.21 : x
  2. Step 2: Convert to fraction form
    7,768.63/10,720.79 = 4,624.21/x
  3. Step 3: Cross multiply
    7,768.63x = 10,720.79 × 4,624.21
  4. Step 4: Simplify right side
    7,768.63x = 49,575,184.33
  5. Step 5: Solve for x
    x = 49,575,184.33/7,768.63
  6. Step 6: Final answer
    x = 6,381.46

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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.