Home / 6,278.79-9,419.63-2,118.68

Finding the Fourth Proportional to 6,278.79, 9,419.63 and 2,118.68

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Solution

The fourth proportional to 6,278.79, 9,419.63 and 2,118.68 is: 3,178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,278.79 : 9,419.63 = 2,118.68 : x
  2. Step 2: Convert to fraction form
    6,278.79/9,419.63 = 2,118.68/x
  3. Step 3: Cross multiply
    6,278.79x = 9,419.63 × 2,118.68
  4. Step 4: Simplify right side
    6,278.79x = 19,957,124.00
  5. Step 5: Solve for x
    x = 19,957,124.00/6,278.79
  6. Step 6: Final answer
    x = 3,178.50

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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.