Home / 20,996.40-31,421.70-19,246.80

Finding the Fourth Proportional to 20,996.40, 31,421.70 and 19,246.80

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Solution

The fourth proportional to 20,996.40, 31,421.70 and 19,246.80 is: 28,803.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.40 : 31,421.70 = 19,246.80 : x
  2. Step 2: Convert to fraction form
    20,996.40/31,421.70 = 19,246.80/x
  3. Step 3: Cross multiply
    20,996.40x = 31,421.70 × 19,246.80
  4. Step 4: Simplify right side
    20,996.40x = 604,767,175.56
  5. Step 5: Solve for x
    x = 604,767,175.56/20,996.40
  6. Step 6: Final answer
    x = 28,803.37

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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.