Home / 4,214.71-6,317.85-2,128.40

Finding the Fourth Proportional to 4,214.71, 6,317.85 and 2,128.40

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Solution

The fourth proportional to 4,214.71, 6,317.85 and 2,128.40 is: 3,190.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,214.71 : 6,317.85 = 2,128.40 : x
  2. Step 2: Convert to fraction form
    4,214.71/6,317.85 = 2,128.40/x
  3. Step 3: Cross multiply
    4,214.71x = 6,317.85 × 2,128.40
  4. Step 4: Simplify right side
    4,214.71x = 13,446,901.30
  5. Step 5: Solve for x
    x = 13,446,901.30/4,214.71
  6. Step 6: Final answer
    x = 3,190.47

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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.