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Finding the Fourth Proportional to 19,018, 28,501.86 and 13,770.56

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Solution

The fourth proportional to 19,018, 28,501.86 and 13,770.56 is: 20,637.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,018 : 28,501.86 = 13,770.56 : x
  2. Step 2: Convert to fraction form
    19,018/28,501.86 = 13,770.56/x
  3. Step 3: Cross multiply
    19,018x = 28,501.86 × 13,770.56
  4. Step 4: Simplify right side
    19,018x = 392,486,573.24
  5. Step 5: Solve for x
    x = 392,486,573.24/19,018
  6. Step 6: Final answer
    x = 20,637.64

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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.