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Finding the Fourth Proportional to 28,120.79, 38,801.90 and 16,794.83

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Solution

The fourth proportional to 28,120.79, 38,801.90 and 16,794.83 is: 23,174.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.79 : 38,801.90 = 16,794.83 : x
  2. Step 2: Convert to fraction form
    28,120.79/38,801.90 = 16,794.83/x
  3. Step 3: Cross multiply
    28,120.79x = 38,801.90 × 16,794.83
  4. Step 4: Simplify right side
    28,120.79x = 651,671,314.18
  5. Step 5: Solve for x
    x = 651,671,314.18/28,120.79
  6. Step 6: Final answer
    x = 23,174.00

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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.