Home / 13,427.74-20,143.77-5,638.78

Finding the Fourth Proportional to 13,427.74, 20,143.77 and 5,638.78

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Solution

The fourth proportional to 13,427.74, 20,143.77 and 5,638.78 is: 8,459.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.74 : 20,143.77 = 5,638.78 : x
  2. Step 2: Convert to fraction form
    13,427.74/20,143.77 = 5,638.78/x
  3. Step 3: Cross multiply
    13,427.74x = 20,143.77 × 5,638.78
  4. Step 4: Simplify right side
    13,427.74x = 113,586,287.40
  5. Step 5: Solve for x
    x = 113,586,287.40/13,427.74
  6. Step 6: Final answer
    x = 8,459.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.