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Finding the Fourth Proportional to 28,550.68, 42,834.78 and 12,768.99

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Solution

The fourth proportional to 28,550.68, 42,834.78 and 12,768.99 is: 19,157.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,550.68 : 42,834.78 = 12,768.99 : x
  2. Step 2: Convert to fraction form
    28,550.68/42,834.78 = 12,768.99/x
  3. Step 3: Cross multiply
    28,550.68x = 42,834.78 × 12,768.99
  4. Step 4: Simplify right side
    28,550.68x = 546,956,703.99
  5. Step 5: Solve for x
    x = 546,956,703.99/28,550.68
  6. Step 6: Final answer
    x = 19,157.40

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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.