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Finding the Fourth Proportional to 13,155, 19,727.70 and 4,387.32

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Solution

The fourth proportional to 13,155, 19,727.70 and 4,387.32 is: 6,579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155 : 19,727.70 = 4,387.32 : x
  2. Step 2: Convert to fraction form
    13,155/19,727.70 = 4,387.32/x
  3. Step 3: Cross multiply
    13,155x = 19,727.70 × 4,387.32
  4. Step 4: Simplify right side
    13,155x = 86,551,732.76
  5. Step 5: Solve for x
    x = 86,551,732.76/13,155
  6. Step 6: Final answer
    x = 6,579.38

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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.