Home / 13,990.51-20,983.70-5,103.76

Finding the Fourth Proportional to 13,990.51, 20,983.70 and 5,103.76

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Solution

The fourth proportional to 13,990.51, 20,983.70 and 5,103.76 is: 7,654.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.51 : 20,983.70 = 5,103.76 : x
  2. Step 2: Convert to fraction form
    13,990.51/20,983.70 = 5,103.76/x
  3. Step 3: Cross multiply
    13,990.51x = 20,983.70 × 5,103.76
  4. Step 4: Simplify right side
    13,990.51x = 107,095,690.73
  5. Step 5: Solve for x
    x = 107,095,690.73/13,990.51
  6. Step 6: Final answer
    x = 7,654.88

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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.