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Finding the Fourth Proportional to 7,855.80, 10,840.73 and 4,318.99

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Solution

The fourth proportional to 7,855.80, 10,840.73 and 4,318.99 is: 5,960.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.80 : 10,840.73 = 4,318.99 : x
  2. Step 2: Convert to fraction form
    7,855.80/10,840.73 = 4,318.99/x
  3. Step 3: Cross multiply
    7,855.80x = 10,840.73 × 4,318.99
  4. Step 4: Simplify right side
    7,855.80x = 46,820,950.26
  5. Step 5: Solve for x
    x = 46,820,950.26/7,855.80
  6. Step 6: Final answer
    x = 5,960.05

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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.