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Finding the Fourth Proportional to 28,969.52, 39,977.64 and 16,394.24

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Solution

The fourth proportional to 28,969.52, 39,977.64 and 16,394.24 is: 22,623.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969.52 : 39,977.64 = 16,394.24 : x
  2. Step 2: Convert to fraction form
    28,969.52/39,977.64 = 16,394.24/x
  3. Step 3: Cross multiply
    28,969.52x = 39,977.64 × 16,394.24
  4. Step 4: Simplify right side
    28,969.52x = 655,403,024.79
  5. Step 5: Solve for x
    x = 655,403,024.79/28,969.52
  6. Step 6: Final answer
    x = 22,623.88

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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.