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Finding the Fourth Proportional to 28,954.64, 39,955.20 and 16,380.20

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Solution

The fourth proportional to 28,954.64, 39,955.20 and 16,380.20 is: 22,603.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,954.64 : 39,955.20 = 16,380.20 : x
  2. Step 2: Convert to fraction form
    28,954.64/39,955.20 = 16,380.20/x
  3. Step 3: Cross multiply
    28,954.64x = 39,955.20 × 16,380.20
  4. Step 4: Simplify right side
    28,954.64x = 654,474,167.04
  5. Step 5: Solve for x
    x = 654,474,167.04/28,954.64
  6. Step 6: Final answer
    x = 22,603.43

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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.