Home / 20,722.76-28,598-11,769.72

Finding the Fourth Proportional to 20,722.76, 28,598 and 11,769.72

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Solution

The fourth proportional to 20,722.76, 28,598 and 11,769.72 is: 16,242.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.76 : 28,598 = 11,769.72 : x
  2. Step 2: Convert to fraction form
    20,722.76/28,598 = 11,769.72/x
  3. Step 3: Cross multiply
    20,722.76x = 28,598 × 11,769.72
  4. Step 4: Simplify right side
    20,722.76x = 336,590,452.56
  5. Step 5: Solve for x
    x = 336,590,452.56/20,722.76
  6. Step 6: Final answer
    x = 16,242.55

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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.