Home / 12,579.12-17,356.14-6,990.12

Finding the Fourth Proportional to 12,579.12, 17,356.14 and 6,990.12

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Solution

The fourth proportional to 12,579.12, 17,356.14 and 6,990.12 is: 9,644.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.12 : 17,356.14 = 6,990.12 : x
  2. Step 2: Convert to fraction form
    12,579.12/17,356.14 = 6,990.12/x
  3. Step 3: Cross multiply
    12,579.12x = 17,356.14 × 6,990.12
  4. Step 4: Simplify right side
    12,579.12x = 121,321,501.34
  5. Step 5: Solve for x
    x = 121,321,501.34/12,579.12
  6. Step 6: Final answer
    x = 9,644.67

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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.