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Finding the Fourth Proportional to 18,907.65, 26,115.48 and 13,864.59

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Solution

The fourth proportional to 18,907.65, 26,115.48 and 13,864.59 is: 19,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.65 : 26,115.48 = 13,864.59 : x
  2. Step 2: Convert to fraction form
    18,907.65/26,115.48 = 13,864.59/x
  3. Step 3: Cross multiply
    18,907.65x = 26,115.48 × 13,864.59
  4. Step 4: Simplify right side
    18,907.65x = 362,080,422.85
  5. Step 5: Solve for x
    x = 362,080,422.85/18,907.65
  6. Step 6: Final answer
    x = 19,149.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.