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Finding the Fourth Proportional to 7,659.95, 11,490.14 and 2,978.84

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Solution

The fourth proportional to 7,659.95, 11,490.14 and 2,978.84 is: 4,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,659.95 : 11,490.14 = 2,978.84 : x
  2. Step 2: Convert to fraction form
    7,659.95/11,490.14 = 2,978.84/x
  3. Step 3: Cross multiply
    7,659.95x = 11,490.14 × 2,978.84
  4. Step 4: Simplify right side
    7,659.95x = 34,227,324.81
  5. Step 5: Solve for x
    x = 34,227,324.81/7,659.95
  6. Step 6: Final answer
    x = 4,468.35

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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.