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Finding the Fourth Proportional to 18,547.75, 27,751.87 and 13,011.90

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Solution

The fourth proportional to 18,547.75, 27,751.87 and 13,011.90 is: 19,468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,547.75 : 27,751.87 = 13,011.90 : x
  2. Step 2: Convert to fraction form
    18,547.75/27,751.87 = 13,011.90/x
  3. Step 3: Cross multiply
    18,547.75x = 27,751.87 × 13,011.90
  4. Step 4: Simplify right side
    18,547.75x = 361,104,557.25
  5. Step 5: Solve for x
    x = 361,104,557.25/18,547.75
  6. Step 6: Final answer
    x = 19,468.91

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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.