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Finding the Fourth Proportional to 18,685.64, 28,032.46 and 6,839.36

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Solution

The fourth proportional to 18,685.64, 28,032.46 and 6,839.36 is: 10,260.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685.64 : 28,032.46 = 6,839.36 : x
  2. Step 2: Convert to fraction form
    18,685.64/28,032.46 = 6,839.36/x
  3. Step 3: Cross multiply
    18,685.64x = 28,032.46 × 6,839.36
  4. Step 4: Simplify right side
    18,685.64x = 191,724,085.63
  5. Step 5: Solve for x
    x = 191,724,085.63/18,685.64
  6. Step 6: Final answer
    x = 10,260.50

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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.