Home / 20,764.40-28,655.68-11,812.72

Finding the Fourth Proportional to 20,764.40, 28,655.68 and 11,812.72

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Solution

The fourth proportional to 20,764.40, 28,655.68 and 11,812.72 is: 16,302.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.40 : 28,655.68 = 11,812.72 : x
  2. Step 2: Convert to fraction form
    20,764.40/28,655.68 = 11,812.72/x
  3. Step 3: Cross multiply
    20,764.40x = 28,655.68 × 11,812.72
  4. Step 4: Simplify right side
    20,764.40x = 338,501,524.25
  5. Step 5: Solve for x
    x = 338,501,524.25/20,764.40
  6. Step 6: Final answer
    x = 16,302.01

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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.