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Finding the Fourth Proportional to 18,921.98, 28,384.46 and 5,774.46

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Solution

The fourth proportional to 18,921.98, 28,384.46 and 5,774.46 is: 8,662.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.98 : 28,384.46 = 5,774.46 : x
  2. Step 2: Convert to fraction form
    18,921.98/28,384.46 = 5,774.46/x
  3. Step 3: Cross multiply
    18,921.98x = 28,384.46 × 5,774.46
  4. Step 4: Simplify right side
    18,921.98x = 163,904,928.89
  5. Step 5: Solve for x
    x = 163,904,928.89/18,921.98
  6. Step 6: Final answer
    x = 8,662.14

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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.