Home / 13,780.10-19,013.20-8,742.50

Finding the Fourth Proportional to 13,780.10, 19,013.20 and 8,742.50

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Solution

The fourth proportional to 13,780.10, 19,013.20 and 8,742.50 is: 12,062.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.10 : 19,013.20 = 8,742.50 : x
  2. Step 2: Convert to fraction form
    13,780.10/19,013.20 = 8,742.50/x
  3. Step 3: Cross multiply
    13,780.10x = 19,013.20 × 8,742.50
  4. Step 4: Simplify right side
    13,780.10x = 166,222,857.29
  5. Step 5: Solve for x
    x = 166,222,857.29/13,780.10
  6. Step 6: Final answer
    x = 12,062.53

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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.