Home / 28,720.34-39,628.20-16,781.37

Finding the Fourth Proportional to 28,720.34, 39,628.20 and 16,781.37

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Solution

The fourth proportional to 28,720.34, 39,628.20 and 16,781.37 is: 23,154.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.34 : 39,628.20 = 16,781.37 : x
  2. Step 2: Convert to fraction form
    28,720.34/39,628.20 = 16,781.37/x
  3. Step 3: Cross multiply
    28,720.34x = 39,628.20 × 16,781.37
  4. Step 4: Simplify right side
    28,720.34x = 665,015,623.87
  5. Step 5: Solve for x
    x = 665,015,623.87/28,720.34
  6. Step 6: Final answer
    x = 23,154.87

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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.