Home / 3,117.12-4,675.80-2,140.80

Finding the Fourth Proportional to 3,117.12, 4,675.80 and 2,140.80

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Solution

The fourth proportional to 3,117.12, 4,675.80 and 2,140.80 is: 3,211.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.12 : 4,675.80 = 2,140.80 : x
  2. Step 2: Convert to fraction form
    3,117.12/4,675.80 = 2,140.80/x
  3. Step 3: Cross multiply
    3,117.12x = 4,675.80 × 2,140.80
  4. Step 4: Simplify right side
    3,117.12x = 10,009,952.64
  5. Step 5: Solve for x
    x = 10,009,952.64/3,117.12
  6. Step 6: Final answer
    x = 3,211.28

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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.