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Finding the Fourth Proportional to 13,995.84, 21,001.08 and 13,189.08

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Solution

The fourth proportional to 13,995.84, 21,001.08 and 13,189.08 is: 19,790.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,995.84 : 21,001.08 = 13,189.08 : x
  2. Step 2: Convert to fraction form
    13,995.84/21,001.08 = 13,189.08/x
  3. Step 3: Cross multiply
    13,995.84x = 21,001.08 × 13,189.08
  4. Step 4: Simplify right side
    13,995.84x = 276,984,924.21
  5. Step 5: Solve for x
    x = 276,984,924.21/13,995.84
  6. Step 6: Final answer
    x = 19,790.52

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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.