Home / 20,772.78-28,665.98-11,341.50

Finding the Fourth Proportional to 20,772.78, 28,665.98 and 11,341.50

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Solution

The fourth proportional to 20,772.78, 28,665.98 and 11,341.50 is: 15,651.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.78 : 28,665.98 = 11,341.50 : x
  2. Step 2: Convert to fraction form
    20,772.78/28,665.98 = 11,341.50/x
  3. Step 3: Cross multiply
    20,772.78x = 28,665.98 × 11,341.50
  4. Step 4: Simplify right side
    20,772.78x = 325,115,212.17
  5. Step 5: Solve for x
    x = 325,115,212.17/20,772.78
  6. Step 6: Final answer
    x = 15,651.02

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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.