Home / 20,772.80-28,666.32-11,341.37

Finding the Fourth Proportional to 20,772.80, 28,666.32 and 11,341.37

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Solution

The fourth proportional to 20,772.80, 28,666.32 and 11,341.37 is: 15,651.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.80 : 28,666.32 = 11,341.37 : x
  2. Step 2: Convert to fraction form
    20,772.80/28,666.32 = 11,341.37/x
  3. Step 3: Cross multiply
    20,772.80x = 28,666.32 × 11,341.37
  4. Step 4: Simplify right side
    20,772.80x = 325,115,341.66
  5. Step 5: Solve for x
    x = 325,115,341.66/20,772.80
  6. Step 6: Final answer
    x = 15,651.01

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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.