Home / 18,742.57-28,118.47-13,206.72

Finding the Fourth Proportional to 18,742.57, 28,118.47 and 13,206.72

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Solution

The fourth proportional to 18,742.57, 28,118.47 and 13,206.72 is: 19,813.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,742.57 : 28,118.47 = 13,206.72 : x
  2. Step 2: Convert to fraction form
    18,742.57/28,118.47 = 13,206.72/x
  3. Step 3: Cross multiply
    18,742.57x = 28,118.47 × 13,206.72
  4. Step 4: Simplify right side
    18,742.57x = 371,352,760.12
  5. Step 5: Solve for x
    x = 371,352,760.12/18,742.57
  6. Step 6: Final answer
    x = 19,813.33

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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.