Home / 28,963.20-39,971.20-16,217.60

Finding the Fourth Proportional to 28,963.20, 39,971.20 and 16,217.60

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Solution

The fourth proportional to 28,963.20, 39,971.20 and 16,217.60 is: 22,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,963.20 : 39,971.20 = 16,217.60 : x
  2. Step 2: Convert to fraction form
    28,963.20/39,971.20 = 16,217.60/x
  3. Step 3: Cross multiply
    28,963.20x = 39,971.20 × 16,217.60
  4. Step 4: Simplify right side
    28,963.20x = 648,236,933.12
  5. Step 5: Solve for x
    x = 648,236,933.12/28,963.20
  6. Step 6: Final answer
    x = 22,381.40

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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.