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Finding the Fourth Proportional to 18,912.12, 28,372.50 and 9,053.88

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Solution

The fourth proportional to 18,912.12, 28,372.50 and 9,053.88 is: 13,582.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.12 : 28,372.50 = 9,053.88 : x
  2. Step 2: Convert to fraction form
    18,912.12/28,372.50 = 9,053.88/x
  3. Step 3: Cross multiply
    18,912.12x = 28,372.50 × 9,053.88
  4. Step 4: Simplify right side
    18,912.12x = 256,881,210.30
  5. Step 5: Solve for x
    x = 256,881,210.30/18,912.12
  6. Step 6: Final answer
    x = 13,582.89

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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.