Home / 2,122.12-2,928.90-1,563.40

Finding the Fourth Proportional to 2,122.12, 2,928.90 and 1,563.40

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Solution

The fourth proportional to 2,122.12, 2,928.90 and 1,563.40 is: 2,157.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.12 : 2,928.90 = 1,563.40 : x
  2. Step 2: Convert to fraction form
    2,122.12/2,928.90 = 1,563.40/x
  3. Step 3: Cross multiply
    2,122.12x = 2,928.90 × 1,563.40
  4. Step 4: Simplify right side
    2,122.12x = 4,579,042.26
  5. Step 5: Solve for x
    x = 4,579,042.26/2,122.12
  6. Step 6: Final answer
    x = 2,157.77

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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.