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Finding the Fourth Proportional to 18,765.68, 28,148.48 and 8,899.56

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Solution

The fourth proportional to 18,765.68, 28,148.48 and 8,899.56 is: 13,349.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.68 : 28,148.48 = 8,899.56 : x
  2. Step 2: Convert to fraction form
    18,765.68/28,148.48 = 8,899.56/x
  3. Step 3: Cross multiply
    18,765.68x = 28,148.48 × 8,899.56
  4. Step 4: Simplify right side
    18,765.68x = 250,509,042.17
  5. Step 5: Solve for x
    x = 250,509,042.17/18,765.68
  6. Step 6: Final answer
    x = 13,349.32

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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.