Home / 20,856.03-28,758.25-13,290.37

Finding the Fourth Proportional to 20,856.03, 28,758.25 and 13,290.37

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Solution

The fourth proportional to 20,856.03, 28,758.25 and 13,290.37 is: 18,326.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.03 : 28,758.25 = 13,290.37 : x
  2. Step 2: Convert to fraction form
    20,856.03/28,758.25 = 13,290.37/x
  3. Step 3: Cross multiply
    20,856.03x = 28,758.25 × 13,290.37
  4. Step 4: Simplify right side
    20,856.03x = 382,207,904.79
  5. Step 5: Solve for x
    x = 382,207,904.79/20,856.03
  6. Step 6: Final answer
    x = 18,326.02

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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.