Home / 20,772.90-28,667.70-11,341.50

Finding the Fourth Proportional to 20,772.90, 28,667.70 and 11,341.50

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Solution

The fourth proportional to 20,772.90, 28,667.70 and 11,341.50 is: 15,651.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.90 : 28,667.70 = 11,341.50 : x
  2. Step 2: Convert to fraction form
    20,772.90/28,667.70 = 11,341.50/x
  3. Step 3: Cross multiply
    20,772.90x = 28,667.70 × 11,341.50
  4. Step 4: Simplify right side
    20,772.90x = 325,134,719.55
  5. Step 5: Solve for x
    x = 325,134,719.55/20,772.90
  6. Step 6: Final answer
    x = 15,651.87

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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.