Home / 20,818.72-28,722.75-11,859.92

Finding the Fourth Proportional to 20,818.72, 28,722.75 and 11,859.92

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Solution

The fourth proportional to 20,818.72, 28,722.75 and 11,859.92 is: 16,362.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.72 : 28,722.75 = 11,859.92 : x
  2. Step 2: Convert to fraction form
    20,818.72/28,722.75 = 11,859.92/x
  3. Step 3: Cross multiply
    20,818.72x = 28,722.75 × 11,859.92
  4. Step 4: Simplify right side
    20,818.72x = 340,649,503.51
  5. Step 5: Solve for x
    x = 340,649,503.51/20,818.72
  6. Step 6: Final answer
    x = 16,362.65

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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.