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Finding the Fourth Proportional to 7,878.76, 11,820.06 and 2,406.76

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Solution

The fourth proportional to 7,878.76, 11,820.06 and 2,406.76 is: 3,610.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.76 : 11,820.06 = 2,406.76 : x
  2. Step 2: Convert to fraction form
    7,878.76/11,820.06 = 2,406.76/x
  3. Step 3: Cross multiply
    7,878.76x = 11,820.06 × 2,406.76
  4. Step 4: Simplify right side
    7,878.76x = 28,448,047.61
  5. Step 5: Solve for x
    x = 28,448,047.61/7,878.76
  6. Step 6: Final answer
    x = 3,610.73

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1.5x scale

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.