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Finding the Fourth Proportional to 28,052, 38,711.80 and 15,477.60

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Solution

The fourth proportional to 28,052, 38,711.80 and 15,477.60 is: 21,359.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,052 : 38,711.80 = 15,477.60 : x
  2. Step 2: Convert to fraction form
    28,052/38,711.80 = 15,477.60/x
  3. Step 3: Cross multiply
    28,052x = 38,711.80 × 15,477.60
  4. Step 4: Simplify right side
    28,052x = 599,165,755.68
  5. Step 5: Solve for x
    x = 599,165,755.68/28,052
  6. Step 6: Final answer
    x = 21,359.11

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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.