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Finding the Fourth Proportional to 13,985.55, 19,299.48 and 8,013.09

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Solution

The fourth proportional to 13,985.55, 19,299.48 and 8,013.09 is: 11,057.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.55 : 19,299.48 = 8,013.09 : x
  2. Step 2: Convert to fraction form
    13,985.55/19,299.48 = 8,013.09/x
  3. Step 3: Cross multiply
    13,985.55x = 19,299.48 × 8,013.09
  4. Step 4: Simplify right side
    13,985.55x = 154,648,470.19
  5. Step 5: Solve for x
    x = 154,648,470.19/13,985.55
  6. Step 6: Final answer
    x = 11,057.73

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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.