Home / 20,865.23-28,778.16-15,114.27

Finding the Fourth Proportional to 20,865.23, 28,778.16 and 15,114.27

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Solution

The fourth proportional to 20,865.23, 28,778.16 and 15,114.27 is: 20,846.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.23 : 28,778.16 = 15,114.27 : x
  2. Step 2: Convert to fraction form
    20,865.23/28,778.16 = 15,114.27/x
  3. Step 3: Cross multiply
    20,865.23x = 28,778.16 × 15,114.27
  4. Step 4: Simplify right side
    20,865.23x = 434,960,880.34
  5. Step 5: Solve for x
    x = 434,960,880.34/20,865.23
  6. Step 6: Final answer
    x = 20,846.21

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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.