Home / 20,986.90-31,402.59-11,759.38

Finding the Fourth Proportional to 20,986.90, 31,402.59 and 11,759.38

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Solution

The fourth proportional to 20,986.90, 31,402.59 and 11,759.38 is: 17,595.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.90 : 31,402.59 = 11,759.38 : x
  2. Step 2: Convert to fraction form
    20,986.90/31,402.59 = 11,759.38/x
  3. Step 3: Cross multiply
    20,986.90x = 31,402.59 × 11,759.38
  4. Step 4: Simplify right side
    20,986.90x = 369,274,988.79
  5. Step 5: Solve for x
    x = 369,274,988.79/20,986.90
  6. Step 6: Final answer
    x = 17,595.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.