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Finding the Fourth Proportional to 7,813.65, 10,782.90 and 4,276.89

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Solution

The fourth proportional to 7,813.65, 10,782.90 and 4,276.89 is: 5,902.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,813.65 : 10,782.90 = 4,276.89 : x
  2. Step 2: Convert to fraction form
    7,813.65/10,782.90 = 4,276.89/x
  3. Step 3: Cross multiply
    7,813.65x = 10,782.90 × 4,276.89
  4. Step 4: Simplify right side
    7,813.65x = 46,117,277.18
  5. Step 5: Solve for x
    x = 46,117,277.18/7,813.65
  6. Step 6: Final answer
    x = 5,902.14

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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.