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Finding the Fourth Proportional to 18,921.12, 28,372.02 and 11,026.14

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Solution

The fourth proportional to 18,921.12, 28,372.02 and 11,026.14 is: 16,533.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.12 : 28,372.02 = 11,026.14 : x
  2. Step 2: Convert to fraction form
    18,921.12/28,372.02 = 11,026.14/x
  3. Step 3: Cross multiply
    18,921.12x = 28,372.02 × 11,026.14
  4. Step 4: Simplify right side
    18,921.12x = 312,833,864.60
  5. Step 5: Solve for x
    x = 312,833,864.60/18,921.12
  6. Step 6: Final answer
    x = 16,533.58

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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.