Home / 13,638.45-20,457.69-3,777.75

Finding the Fourth Proportional to 13,638.45, 20,457.69 and 3,777.75

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Solution

The fourth proportional to 13,638.45, 20,457.69 and 3,777.75 is: 5,666.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.45 : 20,457.69 = 3,777.75 : x
  2. Step 2: Convert to fraction form
    13,638.45/20,457.69 = 3,777.75/x
  3. Step 3: Cross multiply
    13,638.45x = 20,457.69 × 3,777.75
  4. Step 4: Simplify right side
    13,638.45x = 77,284,038.40
  5. Step 5: Solve for x
    x = 77,284,038.40/13,638.45
  6. Step 6: Final answer
    x = 5,666.63

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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.