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Finding the Fourth Proportional to 28,505.37, 42,764.37 and 9,784.99

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Solution

The fourth proportional to 28,505.37, 42,764.37 and 9,784.99 is: 14,679.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.37 : 42,764.37 = 9,784.99 : x
  2. Step 2: Convert to fraction form
    28,505.37/42,764.37 = 9,784.99/x
  3. Step 3: Cross multiply
    28,505.37x = 42,764.37 × 9,784.99
  4. Step 4: Simplify right side
    28,505.37x = 418,448,932.81
  5. Step 5: Solve for x
    x = 418,448,932.81/28,505.37
  6. Step 6: Final answer
    x = 14,679.65

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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.