Home / 3,929.32-5,420.10-2,531.56

Finding the Fourth Proportional to 3,929.32, 5,420.10 and 2,531.56

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Solution

The fourth proportional to 3,929.32, 5,420.10 and 2,531.56 is: 3,492.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.32 : 5,420.10 = 2,531.56 : x
  2. Step 2: Convert to fraction form
    3,929.32/5,420.10 = 2,531.56/x
  3. Step 3: Cross multiply
    3,929.32x = 5,420.10 × 2,531.56
  4. Step 4: Simplify right side
    3,929.32x = 13,721,308.36
  5. Step 5: Solve for x
    x = 13,721,308.36/3,929.32
  6. Step 6: Final answer
    x = 3,492.03

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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.