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Finding the Fourth Proportional to 18,917.64, 28,372.59 and 7,069.23

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Solution

The fourth proportional to 18,917.64, 28,372.59 and 7,069.23 is: 10,602.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.64 : 28,372.59 = 7,069.23 : x
  2. Step 2: Convert to fraction form
    18,917.64/28,372.59 = 7,069.23/x
  3. Step 3: Cross multiply
    18,917.64x = 28,372.59 × 7,069.23
  4. Step 4: Simplify right side
    18,917.64x = 200,572,199.94
  5. Step 5: Solve for x
    x = 200,572,199.94/18,917.64
  6. Step 6: Final answer
    x = 10,602.39

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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.