Home / 20,628.48-30,915.84-8,309.76

Finding the Fourth Proportional to 20,628.48, 30,915.84 and 8,309.76

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Solution

The fourth proportional to 20,628.48, 30,915.84 and 8,309.76 is: 12,453.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.48 : 30,915.84 = 8,309.76 : x
  2. Step 2: Convert to fraction form
    20,628.48/30,915.84 = 8,309.76/x
  3. Step 3: Cross multiply
    20,628.48x = 30,915.84 × 8,309.76
  4. Step 4: Simplify right side
    20,628.48x = 256,903,210.60
  5. Step 5: Solve for x
    x = 256,903,210.60/20,628.48
  6. Step 6: Final answer
    x = 12,453.81

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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.