Home / 3,127.12-4,315.56-1,801.12

Finding the Fourth Proportional to 3,127.12, 4,315.56 and 1,801.12

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Solution

The fourth proportional to 3,127.12, 4,315.56 and 1,801.12 is: 2,485.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.12 : 4,315.56 = 1,801.12 : x
  2. Step 2: Convert to fraction form
    3,127.12/4,315.56 = 1,801.12/x
  3. Step 3: Cross multiply
    3,127.12x = 4,315.56 × 1,801.12
  4. Step 4: Simplify right side
    3,127.12x = 7,772,841.43
  5. Step 5: Solve for x
    x = 7,772,841.43/3,127.12
  6. Step 6: Final answer
    x = 2,485.62

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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.