Home / 10,007.21-15,007.68-3,431.84

Finding the Fourth Proportional to 10,007.21, 15,007.68 and 3,431.84

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Solution

The fourth proportional to 10,007.21, 15,007.68 and 3,431.84 is: 5,146.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,007.21 : 15,007.68 = 3,431.84 : x
  2. Step 2: Convert to fraction form
    10,007.21/15,007.68 = 3,431.84/x
  3. Step 3: Cross multiply
    10,007.21x = 15,007.68 × 3,431.84
  4. Step 4: Simplify right side
    10,007.21x = 51,503,881.49
  5. Step 5: Solve for x
    x = 51,503,881.49/10,007.21
  6. Step 6: Final answer
    x = 5,146.68

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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.