Home / 2,103.12-2,901.60-1,316.88

Finding the Fourth Proportional to 2,103.12, 2,901.60 and 1,316.88

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Solution

The fourth proportional to 2,103.12, 2,901.60 and 1,316.88 is: 1,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.12 : 2,901.60 = 1,316.88 : x
  2. Step 2: Convert to fraction form
    2,103.12/2,901.60 = 1,316.88/x
  3. Step 3: Cross multiply
    2,103.12x = 2,901.60 × 1,316.88
  4. Step 4: Simplify right side
    2,103.12x = 3,821,059.01
  5. Step 5: Solve for x
    x = 3,821,059.01/2,103.12
  6. Step 6: Final answer
    x = 1,816.85

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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.