Home / 13,638.58-20,457.19-4,755.88

Finding the Fourth Proportional to 13,638.58, 20,457.19 and 4,755.88

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Solution

The fourth proportional to 13,638.58, 20,457.19 and 4,755.88 is: 7,133.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.58 : 20,457.19 = 4,755.88 : x
  2. Step 2: Convert to fraction form
    13,638.58/20,457.19 = 4,755.88/x
  3. Step 3: Cross multiply
    13,638.58x = 20,457.19 × 4,755.88
  4. Step 4: Simplify right side
    13,638.58x = 97,291,972.29
  5. Step 5: Solve for x
    x = 97,291,972.29/13,638.58
  6. Step 6: Final answer
    x = 7,133.59

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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.