Home / 20,986.70-31,326.50-18,495.64

Finding the Fourth Proportional to 20,986.70, 31,326.50 and 18,495.64

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Solution

The fourth proportional to 20,986.70, 31,326.50 and 18,495.64 is: 27,608.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.70 : 31,326.50 = 18,495.64 : x
  2. Step 2: Convert to fraction form
    20,986.70/31,326.50 = 18,495.64/x
  3. Step 3: Cross multiply
    20,986.70x = 31,326.50 × 18,495.64
  4. Step 4: Simplify right side
    20,986.70x = 579,403,647.82
  5. Step 5: Solve for x
    x = 579,403,647.82/20,986.70
  6. Step 6: Final answer
    x = 27,608.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.