Home / 20,890.07-31,284-18,866.03

Finding the Fourth Proportional to 20,890.07, 31,284 and 18,866.03

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Solution

The fourth proportional to 20,890.07, 31,284 and 18,866.03 is: 28,252.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.07 : 31,284 = 18,866.03 : x
  2. Step 2: Convert to fraction form
    20,890.07/31,284 = 18,866.03/x
  3. Step 3: Cross multiply
    20,890.07x = 31,284 × 18,866.03
  4. Step 4: Simplify right side
    20,890.07x = 590,204,960.73
  5. Step 5: Solve for x
    x = 590,204,960.73/20,890.07
  6. Step 6: Final answer
    x = 28,252.89

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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.