Home / 20,823.40-31,216.20-7,672.60

Finding the Fourth Proportional to 20,823.40, 31,216.20 and 7,672.60

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Solution

The fourth proportional to 20,823.40, 31,216.20 and 7,672.60 is: 11,501.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.40 : 31,216.20 = 7,672.60 : x
  2. Step 2: Convert to fraction form
    20,823.40/31,216.20 = 7,672.60/x
  3. Step 3: Cross multiply
    20,823.40x = 31,216.20 × 7,672.60
  4. Step 4: Simplify right side
    20,823.40x = 239,509,416.12
  5. Step 5: Solve for x
    x = 239,509,416.12/20,823.40
  6. Step 6: Final answer
    x = 11,501.94

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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.