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Finding the Fourth Proportional to 18,991.10, 26,209.25 and 10,493.97

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Solution

The fourth proportional to 18,991.10, 26,209.25 and 10,493.97 is: 14,482.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.10 : 26,209.25 = 10,493.97 : x
  2. Step 2: Convert to fraction form
    18,991.10/26,209.25 = 10,493.97/x
  3. Step 3: Cross multiply
    18,991.10x = 26,209.25 × 10,493.97
  4. Step 4: Simplify right side
    18,991.10x = 275,038,952.18
  5. Step 5: Solve for x
    x = 275,038,952.18/18,991.10
  6. Step 6: Final answer
    x = 14,482.52

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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.