Home / 20,833.28-31,232.64-7,683.20

Finding the Fourth Proportional to 20,833.28, 31,232.64 and 7,683.20

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Solution

The fourth proportional to 20,833.28, 31,232.64 and 7,683.20 is: 11,518.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.28 : 31,232.64 = 7,683.20 : x
  2. Step 2: Convert to fraction form
    20,833.28/31,232.64 = 7,683.20/x
  3. Step 3: Cross multiply
    20,833.28x = 31,232.64 × 7,683.20
  4. Step 4: Simplify right side
    20,833.28x = 239,966,619.65
  5. Step 5: Solve for x
    x = 239,966,619.65/20,833.28
  6. Step 6: Final answer
    x = 11,518.43

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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.