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Finding the Fourth Proportional to 16,908.80, 25,334.40 and 13,971.20

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Solution

The fourth proportional to 16,908.80, 25,334.40 and 13,971.20 is: 20,933.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,908.80 : 25,334.40 = 13,971.20 : x
  2. Step 2: Convert to fraction form
    16,908.80/25,334.40 = 13,971.20/x
  3. Step 3: Cross multiply
    16,908.80x = 25,334.40 × 13,971.20
  4. Step 4: Simplify right side
    16,908.80x = 353,951,969.28
  5. Step 5: Solve for x
    x = 353,951,969.28/16,908.80
  6. Step 6: Final answer
    x = 20,933.00

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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.