Home / 20,740.56-31,043.70-11,239.92

Finding the Fourth Proportional to 20,740.56, 31,043.70 and 11,239.92

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Solution

The fourth proportional to 20,740.56, 31,043.70 and 11,239.92 is: 16,823.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.56 : 31,043.70 = 11,239.92 : x
  2. Step 2: Convert to fraction form
    20,740.56/31,043.70 = 11,239.92/x
  3. Step 3: Cross multiply
    20,740.56x = 31,043.70 × 11,239.92
  4. Step 4: Simplify right side
    20,740.56x = 348,928,704.50
  5. Step 5: Solve for x
    x = 348,928,704.50/20,740.56
  6. Step 6: Final answer
    x = 16,823.49

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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.