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Finding the Fourth Proportional to 20,562, 28,362.80 and 15,178.94

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Solution

The fourth proportional to 20,562, 28,362.80 and 15,178.94 is: 20,937.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562 : 28,362.80 = 15,178.94 : x
  2. Step 2: Convert to fraction form
    20,562/28,362.80 = 15,178.94/x
  3. Step 3: Cross multiply
    20,562x = 28,362.80 × 15,178.94
  4. Step 4: Simplify right side
    20,562x = 430,517,239.43
  5. Step 5: Solve for x
    x = 430,517,239.43/20,562
  6. Step 6: Final answer
    x = 20,937.52

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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.