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Finding the Fourth Proportional to 20,590.15, 30,928.02 and 16,645.87

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Solution

The fourth proportional to 20,590.15, 30,928.02 and 16,645.87 is: 25,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.15 : 30,928.02 = 16,645.87 : x
  2. Step 2: Convert to fraction form
    20,590.15/30,928.02 = 16,645.87/x
  3. Step 3: Cross multiply
    20,590.15x = 30,928.02 × 16,645.87
  4. Step 4: Simplify right side
    20,590.15x = 514,823,800.28
  5. Step 5: Solve for x
    x = 514,823,800.28/20,590.15
  6. Step 6: Final answer
    x = 25,003.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.