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Finding the Fourth Proportional to 20,698.57, 28,529.86 and 14,640.99

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Solution

The fourth proportional to 20,698.57, 28,529.86 and 14,640.99 is: 20,180.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.57 : 28,529.86 = 14,640.99 : x
  2. Step 2: Convert to fraction form
    20,698.57/28,529.86 = 14,640.99/x
  3. Step 3: Cross multiply
    20,698.57x = 28,529.86 × 14,640.99
  4. Step 4: Simplify right side
    20,698.57x = 417,705,394.96
  5. Step 5: Solve for x
    x = 417,705,394.96/20,698.57
  6. Step 6: Final answer
    x = 20,180.40

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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.