Home / 20,926.95-28,879.09-11,495.31

Finding the Fourth Proportional to 20,926.95, 28,879.09 and 11,495.31

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Solution

The fourth proportional to 20,926.95, 28,879.09 and 11,495.31 is: 15,863.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.95 : 28,879.09 = 11,495.31 : x
  2. Step 2: Convert to fraction form
    20,926.95/28,879.09 = 11,495.31/x
  3. Step 3: Cross multiply
    20,926.95x = 28,879.09 × 11,495.31
  4. Step 4: Simplify right side
    20,926.95x = 331,974,092.07
  5. Step 5: Solve for x
    x = 331,974,092.07/20,926.95
  6. Step 6: Final answer
    x = 15,863.47

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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.