Home / 20,764.55-28,652.48-11,688.79

Finding the Fourth Proportional to 20,764.55, 28,652.48 and 11,688.79

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Solution

The fourth proportional to 20,764.55, 28,652.48 and 11,688.79 is: 16,129.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.55 : 28,652.48 = 11,688.79 : x
  2. Step 2: Convert to fraction form
    20,764.55/28,652.48 = 11,688.79/x
  3. Step 3: Cross multiply
    20,764.55x = 28,652.48 × 11,688.79
  4. Step 4: Simplify right side
    20,764.55x = 334,912,821.70
  5. Step 5: Solve for x
    x = 334,912,821.70/20,764.55
  6. Step 6: Final answer
    x = 16,129.07

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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.