Home / 3,127.15-4,315.88-1,800.91

Finding the Fourth Proportional to 3,127.15, 4,315.88 and 1,800.91

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Solution

The fourth proportional to 3,127.15, 4,315.88 and 1,800.91 is: 2,485.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.15 : 4,315.88 = 1,800.91 : x
  2. Step 2: Convert to fraction form
    3,127.15/4,315.88 = 1,800.91/x
  3. Step 3: Cross multiply
    3,127.15x = 4,315.88 × 1,800.91
  4. Step 4: Simplify right side
    3,127.15x = 7,772,511.45
  5. Step 5: Solve for x
    x = 7,772,511.45/3,127.15
  6. Step 6: Final answer
    x = 2,485.49

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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.