Home / 8,428.08-12,628.08-5,131.20

Finding the Fourth Proportional to 8,428.08, 12,628.08 and 5,131.20

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Solution

The fourth proportional to 8,428.08, 12,628.08 and 5,131.20 is: 7,688.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.08 : 12,628.08 = 5,131.20 : x
  2. Step 2: Convert to fraction form
    8,428.08/12,628.08 = 5,131.20/x
  3. Step 3: Cross multiply
    8,428.08x = 12,628.08 × 5,131.20
  4. Step 4: Simplify right side
    8,428.08x = 64,797,204.10
  5. Step 5: Solve for x
    x = 64,797,204.10/8,428.08
  6. Step 6: Final answer
    x = 7,688.25

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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.