Home / 3,018.40-4,162.68-2,178.64

Finding the Fourth Proportional to 3,018.40, 4,162.68 and 2,178.64

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Solution

The fourth proportional to 3,018.40, 4,162.68 and 2,178.64 is: 3,004.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,018.40 : 4,162.68 = 2,178.64 : x
  2. Step 2: Convert to fraction form
    3,018.40/4,162.68 = 2,178.64/x
  3. Step 3: Cross multiply
    3,018.40x = 4,162.68 × 2,178.64
  4. Step 4: Simplify right side
    3,018.40x = 9,068,981.16
  5. Step 5: Solve for x
    x = 9,068,981.16/3,018.40
  6. Step 6: Final answer
    x = 3,004.57

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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.