Home / 13,780.59-19,018.90-8,115.04

Finding the Fourth Proportional to 13,780.59, 19,018.90 and 8,115.04

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Solution

The fourth proportional to 13,780.59, 19,018.90 and 8,115.04 is: 11,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.59 : 19,018.90 = 8,115.04 : x
  2. Step 2: Convert to fraction form
    13,780.59/19,018.90 = 8,115.04/x
  3. Step 3: Cross multiply
    13,780.59x = 19,018.90 × 8,115.04
  4. Step 4: Simplify right side
    13,780.59x = 154,339,134.26
  5. Step 5: Solve for x
    x = 154,339,134.26/13,780.59
  6. Step 6: Final answer
    x = 11,199.75

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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.