Home / 9,929.84-13,712.40-6,399.12

Finding the Fourth Proportional to 9,929.84, 13,712.40 and 6,399.12

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Solution

The fourth proportional to 9,929.84, 13,712.40 and 6,399.12 is: 8,836.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,929.84 : 13,712.40 = 6,399.12 : x
  2. Step 2: Convert to fraction form
    9,929.84/13,712.40 = 6,399.12/x
  3. Step 3: Cross multiply
    9,929.84x = 13,712.40 × 6,399.12
  4. Step 4: Simplify right side
    9,929.84x = 87,747,293.09
  5. Step 5: Solve for x
    x = 87,747,293.09/9,929.84
  6. Step 6: Final answer
    x = 8,836.73

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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.