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Finding the Fourth Proportional to 13,998.66, 19,354.76 and 13,379.01

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Solution

The fourth proportional to 13,998.66, 19,354.76 and 13,379.01 is: 18,498.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.66 : 19,354.76 = 13,379.01 : x
  2. Step 2: Convert to fraction form
    13,998.66/19,354.76 = 13,379.01/x
  3. Step 3: Cross multiply
    13,998.66x = 19,354.76 × 13,379.01
  4. Step 4: Simplify right side
    13,998.66x = 258,947,460.69
  5. Step 5: Solve for x
    x = 258,947,460.69/13,998.66
  6. Step 6: Final answer
    x = 18,498.02

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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.