Home / 2,921.19-4,031.21-1,801.68

Finding the Fourth Proportional to 2,921.19, 4,031.21 and 1,801.68

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Solution

The fourth proportional to 2,921.19, 4,031.21 and 1,801.68 is: 2,486.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.19 : 4,031.21 = 1,801.68 : x
  2. Step 2: Convert to fraction form
    2,921.19/4,031.21 = 1,801.68/x
  3. Step 3: Cross multiply
    2,921.19x = 4,031.21 × 1,801.68
  4. Step 4: Simplify right side
    2,921.19x = 7,262,962.50
  5. Step 5: Solve for x
    x = 7,262,962.50/2,921.19
  6. Step 6: Final answer
    x = 2,486.30

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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.