Home / 3,015.70-4,161.18-1,689.40

Finding the Fourth Proportional to 3,015.70, 4,161.18 and 1,689.40

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Solution

The fourth proportional to 3,015.70, 4,161.18 and 1,689.40 is: 2,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.70 : 4,161.18 = 1,689.40 : x
  2. Step 2: Convert to fraction form
    3,015.70/4,161.18 = 1,689.40/x
  3. Step 3: Cross multiply
    3,015.70x = 4,161.18 × 1,689.40
  4. Step 4: Simplify right side
    3,015.70x = 7,029,897.49
  5. Step 5: Solve for x
    x = 7,029,897.49/3,015.70
  6. Step 6: Final answer
    x = 2,331.10

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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.