Home / 3,127.71-4,315.75-1,801.20

Finding the Fourth Proportional to 3,127.71, 4,315.75 and 1,801.20

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Solution

The fourth proportional to 3,127.71, 4,315.75 and 1,801.20 is: 2,485.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.71 : 4,315.75 = 1,801.20 : x
  2. Step 2: Convert to fraction form
    3,127.71/4,315.75 = 1,801.20/x
  3. Step 3: Cross multiply
    3,127.71x = 4,315.75 × 1,801.20
  4. Step 4: Simplify right side
    3,127.71x = 7,773,528.90
  5. Step 5: Solve for x
    x = 7,773,528.90/3,127.71
  6. Step 6: Final answer
    x = 2,485.37

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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.