Home / 3,145.10-4,340.48-1,886.20

Finding the Fourth Proportional to 3,145.10, 4,340.48 and 1,886.20

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Solution

The fourth proportional to 3,145.10, 4,340.48 and 1,886.20 is: 2,603.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.10 : 4,340.48 = 1,886.20 : x
  2. Step 2: Convert to fraction form
    3,145.10/4,340.48 = 1,886.20/x
  3. Step 3: Cross multiply
    3,145.10x = 4,340.48 × 1,886.20
  4. Step 4: Simplify right side
    3,145.10x = 8,187,024.23
  5. Step 5: Solve for x
    x = 8,187,024.23/3,145.10
  6. Step 6: Final answer
    x = 2,603.10

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Double scale
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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.