Home / 20,685.33-28,525.91-13,894.70

Finding the Fourth Proportional to 20,685.33, 28,525.91 and 13,894.70

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Solution

The fourth proportional to 20,685.33, 28,525.91 and 13,894.70 is: 19,161.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.33 : 28,525.91 = 13,894.70 : x
  2. Step 2: Convert to fraction form
    20,685.33/28,525.91 = 13,894.70/x
  3. Step 3: Cross multiply
    20,685.33x = 28,525.91 × 13,894.70
  4. Step 4: Simplify right side
    20,685.33x = 396,358,749.57
  5. Step 5: Solve for x
    x = 396,358,749.57/20,685.33
  6. Step 6: Final answer
    x = 19,161.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.