Home / 2,121.02-2,926.50-1,236.32

Finding the Fourth Proportional to 2,121.02, 2,926.50 and 1,236.32

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Solution

The fourth proportional to 2,121.02, 2,926.50 and 1,236.32 is: 1,705.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.02 : 2,926.50 = 1,236.32 : x
  2. Step 2: Convert to fraction form
    2,121.02/2,926.50 = 1,236.32/x
  3. Step 3: Cross multiply
    2,121.02x = 2,926.50 × 1,236.32
  4. Step 4: Simplify right side
    2,121.02x = 3,618,090.48
  5. Step 5: Solve for x
    x = 3,618,090.48/2,121.02
  6. Step 6: Final answer
    x = 1,705.83

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Half scale
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Double scale
Find fourth proportional to 2,122.02, 2,927.88 and 1,237.32
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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.