Home / 3,146.76-4,341.28-1,820.24

Finding the Fourth Proportional to 3,146.76, 4,341.28 and 1,820.24

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Solution

The fourth proportional to 3,146.76, 4,341.28 and 1,820.24 is: 2,511.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,146.76 : 4,341.28 = 1,820.24 : x
  2. Step 2: Convert to fraction form
    3,146.76/4,341.28 = 1,820.24/x
  3. Step 3: Cross multiply
    3,146.76x = 4,341.28 × 1,820.24
  4. Step 4: Simplify right side
    3,146.76x = 7,902,171.51
  5. Step 5: Solve for x
    x = 7,902,171.51/3,146.76
  6. Step 6: Final answer
    x = 2,511.21

Related Problems

Find fourth proportional to 1,573.38, 2,170.64 and 910.12
Half scale
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Double scale
Find fourth proportional to 3,147.76, 4,342.66 and 1,821.24
Similar ratio
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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.