Home / 8,431.87-12,628.12-6,665.01

Finding the Fourth Proportional to 8,431.87, 12,628.12 and 6,665.01

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Solution

The fourth proportional to 8,431.87, 12,628.12 and 6,665.01 is: 9,981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.87 : 12,628.12 = 6,665.01 : x
  2. Step 2: Convert to fraction form
    8,431.87/12,628.12 = 6,665.01/x
  3. Step 3: Cross multiply
    8,431.87x = 12,628.12 × 6,665.01
  4. Step 4: Simplify right side
    8,431.87x = 84,166,501.96
  5. Step 5: Solve for x
    x = 84,166,501.96/8,431.87
  6. Step 6: Final answer
    x = 9,981.95

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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.