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Finding the Fourth Proportional to 7,809, 11,710.68 and 3,130.08

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Solution

The fourth proportional to 7,809, 11,710.68 and 3,130.08 is: 4,693.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809 : 11,710.68 = 3,130.08 : x
  2. Step 2: Convert to fraction form
    7,809/11,710.68 = 3,130.08/x
  3. Step 3: Cross multiply
    7,809x = 11,710.68 × 3,130.08
  4. Step 4: Simplify right side
    7,809x = 36,655,365.25
  5. Step 5: Solve for x
    x = 36,655,365.25/7,809
  6. Step 6: Final answer
    x = 4,693.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.