Home / 3,147.71-4,343.58-1,821.50

Finding the Fourth Proportional to 3,147.71, 4,343.58 and 1,821.50

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Solution

The fourth proportional to 3,147.71, 4,343.58 and 1,821.50 is: 2,513.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.71 : 4,343.58 = 1,821.50 : x
  2. Step 2: Convert to fraction form
    3,147.71/4,343.58 = 1,821.50/x
  3. Step 3: Cross multiply
    3,147.71x = 4,343.58 × 1,821.50
  4. Step 4: Simplify right side
    3,147.71x = 7,911,830.97
  5. Step 5: Solve for x
    x = 7,911,830.97/3,147.71
  6. Step 6: Final answer
    x = 2,513.52

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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.