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Finding the Fourth Proportional to 28,011.72, 38,639.04 and 16,673.64

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Solution

The fourth proportional to 28,011.72, 38,639.04 and 16,673.64 is: 22,999.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011.72 : 38,639.04 = 16,673.64 : x
  2. Step 2: Convert to fraction form
    28,011.72/38,639.04 = 16,673.64/x
  3. Step 3: Cross multiply
    28,011.72x = 38,639.04 × 16,673.64
  4. Step 4: Simplify right side
    28,011.72x = 644,253,442.91
  5. Step 5: Solve for x
    x = 644,253,442.91/28,011.72
  6. Step 6: Final answer
    x = 22,999.42

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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.