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Finding the Fourth Proportional to 18,783.92, 28,169.21 and 6,935.16

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Solution

The fourth proportional to 18,783.92, 28,169.21 and 6,935.16 is: 10,400.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.92 : 28,169.21 = 6,935.16 : x
  2. Step 2: Convert to fraction form
    18,783.92/28,169.21 = 6,935.16/x
  3. Step 3: Cross multiply
    18,783.92x = 28,169.21 × 6,935.16
  4. Step 4: Simplify right side
    18,783.92x = 195,357,995.76
  5. Step 5: Solve for x
    x = 195,357,995.76/18,783.92
  6. Step 6: Final answer
    x = 10,400.28

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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.