Home / 12,440.12-18,628.38-6,887.30

Finding the Fourth Proportional to 12,440.12, 18,628.38 and 6,887.30

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Solution

The fourth proportional to 12,440.12, 18,628.38 and 6,887.30 is: 10,313.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,440.12 : 18,628.38 = 6,887.30 : x
  2. Step 2: Convert to fraction form
    12,440.12/18,628.38 = 6,887.30/x
  3. Step 3: Cross multiply
    12,440.12x = 18,628.38 × 6,887.30
  4. Step 4: Simplify right side
    12,440.12x = 128,299,148.43
  5. Step 5: Solve for x
    x = 128,299,148.43/12,440.12
  6. Step 6: Final answer
    x = 10,313.34

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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.