Home / 20,731.36-31,086.96-7,574.80

Finding the Fourth Proportional to 20,731.36, 31,086.96 and 7,574.80

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Solution

The fourth proportional to 20,731.36, 31,086.96 and 7,574.80 is: 11,358.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.36 : 31,086.96 = 7,574.80 : x
  2. Step 2: Convert to fraction form
    20,731.36/31,086.96 = 7,574.80/x
  3. Step 3: Cross multiply
    20,731.36x = 31,086.96 × 7,574.80
  4. Step 4: Simplify right side
    20,731.36x = 235,477,504.61
  5. Step 5: Solve for x
    x = 235,477,504.61/20,731.36
  6. Step 6: Final answer
    x = 11,358.52

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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.