Home / 13,779.10-20,671.38-5,457.57

Finding the Fourth Proportional to 13,779.10, 20,671.38 and 5,457.57

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Solution

The fourth proportional to 13,779.10, 20,671.38 and 5,457.57 is: 8,187.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.10 : 20,671.38 = 5,457.57 : x
  2. Step 2: Convert to fraction form
    13,779.10/20,671.38 = 5,457.57/x
  3. Step 3: Cross multiply
    13,779.10x = 20,671.38 × 5,457.57
  4. Step 4: Simplify right side
    13,779.10x = 112,815,503.35
  5. Step 5: Solve for x
    x = 112,815,503.35/13,779.10
  6. Step 6: Final answer
    x = 8,187.44

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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.