Home / 20,908.96-28,854.41-12,412.79

Finding the Fourth Proportional to 20,908.96, 28,854.41 and 12,412.79

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Solution

The fourth proportional to 20,908.96, 28,854.41 and 12,412.79 is: 17,129.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.96 : 28,854.41 = 12,412.79 : x
  2. Step 2: Convert to fraction form
    20,908.96/28,854.41 = 12,412.79/x
  3. Step 3: Cross multiply
    20,908.96x = 28,854.41 × 12,412.79
  4. Step 4: Simplify right side
    20,908.96x = 358,163,525.57
  5. Step 5: Solve for x
    x = 358,163,525.57/20,908.96
  6. Step 6: Final answer
    x = 17,129.67

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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.