Home / 3,111.47-4,293.80-1,695.23

Finding the Fourth Proportional to 3,111.47, 4,293.80 and 1,695.23

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Solution

The fourth proportional to 3,111.47, 4,293.80 and 1,695.23 is: 2,339.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.47 : 4,293.80 = 1,695.23 : x
  2. Step 2: Convert to fraction form
    3,111.47/4,293.80 = 1,695.23/x
  3. Step 3: Cross multiply
    3,111.47x = 4,293.80 × 1,695.23
  4. Step 4: Simplify right side
    3,111.47x = 7,278,961.34
  5. Step 5: Solve for x
    x = 7,278,961.34/3,111.47
  6. Step 6: Final answer
    x = 2,339.40

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Half scale
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Double scale
Find fourth proportional to 3,112.47, 4,295.18 and 1,696.23
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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.