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Finding the Fourth Proportional to 18,905.59, 28,315.25 and 9,051.84

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Solution

The fourth proportional to 18,905.59, 28,315.25 and 9,051.84 is: 13,557.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.59 : 28,315.25 = 9,051.84 : x
  2. Step 2: Convert to fraction form
    18,905.59/28,315.25 = 9,051.84/x
  3. Step 3: Cross multiply
    18,905.59x = 28,315.25 × 9,051.84
  4. Step 4: Simplify right side
    18,905.59x = 256,305,112.56
  5. Step 5: Solve for x
    x = 256,305,112.56/18,905.59
  6. Step 6: Final answer
    x = 13,557.11

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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.