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Finding the Fourth Proportional to 20,628, 28,486.08 and 14,357.52

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Solution

The fourth proportional to 20,628, 28,486.08 and 14,357.52 is: 19,826.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628 : 28,486.08 = 14,357.52 : x
  2. Step 2: Convert to fraction form
    20,628/28,486.08 = 14,357.52/x
  3. Step 3: Cross multiply
    20,628x = 28,486.08 × 14,357.52
  4. Step 4: Simplify right side
    20,628x = 408,989,463.32
  5. Step 5: Solve for x
    x = 408,989,463.32/20,628
  6. Step 6: Final answer
    x = 19,826.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.