Home / 20,973.50-28,938.66-15,311.33

Finding the Fourth Proportional to 20,973.50, 28,938.66 and 15,311.33

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Solution

The fourth proportional to 20,973.50, 28,938.66 and 15,311.33 is: 21,126.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.50 : 28,938.66 = 15,311.33 : x
  2. Step 2: Convert to fraction form
    20,973.50/28,938.66 = 15,311.33/x
  3. Step 3: Cross multiply
    20,973.50x = 28,938.66 × 15,311.33
  4. Step 4: Simplify right side
    20,973.50x = 443,089,228.32
  5. Step 5: Solve for x
    x = 443,089,228.32/20,973.50
  6. Step 6: Final answer
    x = 21,126.15

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1.5x scale

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.