Home / 12,688.14-17,503.68-8,441.28

Finding the Fourth Proportional to 12,688.14, 17,503.68 and 8,441.28

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Solution

The fourth proportional to 12,688.14, 17,503.68 and 8,441.28 is: 11,645.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.14 : 17,503.68 = 8,441.28 : x
  2. Step 2: Convert to fraction form
    12,688.14/17,503.68 = 8,441.28/x
  3. Step 3: Cross multiply
    12,688.14x = 17,503.68 × 8,441.28
  4. Step 4: Simplify right side
    12,688.14x = 147,753,463.91
  5. Step 5: Solve for x
    x = 147,753,463.91/12,688.14
  6. Step 6: Final answer
    x = 11,645.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.