Home / 28,270.90-42,448.20-15,815.80

Finding the Fourth Proportional to 28,270.90, 42,448.20 and 15,815.80

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Solution

The fourth proportional to 28,270.90, 42,448.20 and 15,815.80 is: 23,747.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,270.90 : 42,448.20 = 15,815.80 : x
  2. Step 2: Convert to fraction form
    28,270.90/42,448.20 = 15,815.80/x
  3. Step 3: Cross multiply
    28,270.90x = 42,448.20 × 15,815.80
  4. Step 4: Simplify right side
    28,270.90x = 671,352,241.56
  5. Step 5: Solve for x
    x = 671,352,241.56/28,270.90
  6. Step 6: Final answer
    x = 23,747.11

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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.