Home / 20,351.40-28,088.34-12,396.72

Finding the Fourth Proportional to 20,351.40, 28,088.34 and 12,396.72

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Solution

The fourth proportional to 20,351.40, 28,088.34 and 12,396.72 is: 17,109.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.40 : 28,088.34 = 12,396.72 : x
  2. Step 2: Convert to fraction form
    20,351.40/28,088.34 = 12,396.72/x
  3. Step 3: Cross multiply
    20,351.40x = 28,088.34 × 12,396.72
  4. Step 4: Simplify right side
    20,351.40x = 348,203,286.24
  5. Step 5: Solve for x
    x = 348,203,286.24/20,351.40
  6. Step 6: Final answer
    x = 17,109.55

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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.