Home / 20,341.49-28,072.31-11,388.45

Finding the Fourth Proportional to 20,341.49, 28,072.31 and 11,388.45

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Solution

The fourth proportional to 20,341.49, 28,072.31 and 11,388.45 is: 15,716.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,341.49 : 28,072.31 = 11,388.45 : x
  2. Step 2: Convert to fraction form
    20,341.49/28,072.31 = 11,388.45/x
  3. Step 3: Cross multiply
    20,341.49x = 28,072.31 × 11,388.45
  4. Step 4: Simplify right side
    20,341.49x = 319,700,147.15
  5. Step 5: Solve for x
    x = 319,700,147.15/20,341.49
  6. Step 6: Final answer
    x = 15,716.66

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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.