Home / 3,117.80-4,300.53-1,938.80

Finding the Fourth Proportional to 3,117.80, 4,300.53 and 1,938.80

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Solution

The fourth proportional to 3,117.80, 4,300.53 and 1,938.80 is: 2,674.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.80 : 4,300.53 = 1,938.80 : x
  2. Step 2: Convert to fraction form
    3,117.80/4,300.53 = 1,938.80/x
  3. Step 3: Cross multiply
    3,117.80x = 4,300.53 × 1,938.80
  4. Step 4: Simplify right side
    3,117.80x = 8,337,867.56
  5. Step 5: Solve for x
    x = 8,337,867.56/3,117.80
  6. Step 6: Final answer
    x = 2,674.28

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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.