Home / 8,421.76-12,628.32-4,912.88

Finding the Fourth Proportional to 8,421.76, 12,628.32 and 4,912.88

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Solution

The fourth proportional to 8,421.76, 12,628.32 and 4,912.88 is: 7,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.76 : 12,628.32 = 4,912.88 : x
  2. Step 2: Convert to fraction form
    8,421.76/12,628.32 = 4,912.88/x
  3. Step 3: Cross multiply
    8,421.76x = 12,628.32 × 4,912.88
  4. Step 4: Simplify right side
    8,421.76x = 62,041,420.76
  5. Step 5: Solve for x
    x = 62,041,420.76/8,421.76
  6. Step 6: Final answer
    x = 7,366.80

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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.