Home / 11,478.80-15,839.44-6,441.96

Finding the Fourth Proportional to 11,478.80, 15,839.44 and 6,441.96

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Solution

The fourth proportional to 11,478.80, 15,839.44 and 6,441.96 is: 8,889.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,478.80 : 15,839.44 = 6,441.96 : x
  2. Step 2: Convert to fraction form
    11,478.80/15,839.44 = 6,441.96/x
  3. Step 3: Cross multiply
    11,478.80x = 15,839.44 × 6,441.96
  4. Step 4: Simplify right side
    11,478.80x = 102,037,038.90
  5. Step 5: Solve for x
    x = 102,037,038.90/11,478.80
  6. Step 6: Final answer
    x = 8,889.17

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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.