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Finding the Fourth Proportional to 28,305, 39,061.70 and 16,976.34

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Solution

The fourth proportional to 28,305, 39,061.70 and 16,976.34 is: 23,427.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305 : 39,061.70 = 16,976.34 : x
  2. Step 2: Convert to fraction form
    28,305/39,061.70 = 16,976.34/x
  3. Step 3: Cross multiply
    28,305x = 39,061.70 × 16,976.34
  4. Step 4: Simplify right side
    28,305x = 663,124,700.18
  5. Step 5: Solve for x
    x = 663,124,700.18/28,305
  6. Step 6: Final answer
    x = 23,427.83

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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.