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Finding the Fourth Proportional to 13,998.51, 21,005.06 and 6,205.50

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Solution

The fourth proportional to 13,998.51, 21,005.06 and 6,205.50 is: 9,311.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.51 : 21,005.06 = 6,205.50 : x
  2. Step 2: Convert to fraction form
    13,998.51/21,005.06 = 6,205.50/x
  3. Step 3: Cross multiply
    13,998.51x = 21,005.06 × 6,205.50
  4. Step 4: Simplify right side
    13,998.51x = 130,346,868.80
  5. Step 5: Solve for x
    x = 130,346,868.80/13,998.51
  6. Step 6: Final answer
    x = 9,311.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.