Home / 20,848.50-28,771.02-13,396.50

Finding the Fourth Proportional to 20,848.50, 28,771.02 and 13,396.50

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Solution

The fourth proportional to 20,848.50, 28,771.02 and 13,396.50 is: 18,487.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,848.50 : 28,771.02 = 13,396.50 : x
  2. Step 2: Convert to fraction form
    20,848.50/28,771.02 = 13,396.50/x
  3. Step 3: Cross multiply
    20,848.50x = 28,771.02 × 13,396.50
  4. Step 4: Simplify right side
    20,848.50x = 385,430,969.43
  5. Step 5: Solve for x
    x = 385,430,969.43/20,848.50
  6. Step 6: Final answer
    x = 18,487.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.