Home / 2,118.50-2,921.60-1,819.66

Finding the Fourth Proportional to 2,118.50, 2,921.60 and 1,819.66

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Solution

The fourth proportional to 2,118.50, 2,921.60 and 1,819.66 is: 2,509.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.50 : 2,921.60 = 1,819.66 : x
  2. Step 2: Convert to fraction form
    2,118.50/2,921.60 = 1,819.66/x
  3. Step 3: Cross multiply
    2,118.50x = 2,921.60 × 1,819.66
  4. Step 4: Simplify right side
    2,118.50x = 5,316,318.66
  5. Step 5: Solve for x
    x = 5,316,318.66/2,118.50
  6. Step 6: Final answer
    x = 2,509.47

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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.