Home / 20,856.20-31,284.28-8,376.22

Finding the Fourth Proportional to 20,856.20, 31,284.28 and 8,376.22

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Solution

The fourth proportional to 20,856.20, 31,284.28 and 8,376.22 is: 12,564.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.20 : 31,284.28 = 8,376.22 : x
  2. Step 2: Convert to fraction form
    20,856.20/31,284.28 = 8,376.22/x
  3. Step 3: Cross multiply
    20,856.20x = 31,284.28 × 8,376.22
  4. Step 4: Simplify right side
    20,856.20x = 262,043,913.31
  5. Step 5: Solve for x
    x = 262,043,913.31/20,856.20
  6. Step 6: Final answer
    x = 12,564.32

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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.