Home / 13,628.57-20,457.16-12,078.49

Finding the Fourth Proportional to 13,628.57, 20,457.16 and 12,078.49

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Solution

The fourth proportional to 13,628.57, 20,457.16 and 12,078.49 is: 18,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,628.57 : 20,457.16 = 12,078.49 : x
  2. Step 2: Convert to fraction form
    13,628.57/20,457.16 = 12,078.49/x
  3. Step 3: Cross multiply
    13,628.57x = 20,457.16 × 12,078.49
  4. Step 4: Simplify right side
    13,628.57x = 247,091,542.10
  5. Step 5: Solve for x
    x = 247,091,542.10/13,628.57
  6. Step 6: Final answer
    x = 18,130.41

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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.