Home / 20,772.14-28,667.18-11,820.02

Finding the Fourth Proportional to 20,772.14, 28,667.18 and 11,820.02

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Solution

The fourth proportional to 20,772.14, 28,667.18 and 11,820.02 is: 16,312.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.14 : 28,667.18 = 11,820.02 : x
  2. Step 2: Convert to fraction form
    20,772.14/28,667.18 = 11,820.02/x
  3. Step 3: Cross multiply
    20,772.14x = 28,667.18 × 11,820.02
  4. Step 4: Simplify right side
    20,772.14x = 338,846,527.16
  5. Step 5: Solve for x
    x = 338,846,527.16/20,772.14
  6. Step 6: Final answer
    x = 16,312.55

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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.