Home / 10,720.12-14,786.88-7,731.22

Finding the Fourth Proportional to 10,720.12, 14,786.88 and 7,731.22

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Solution

The fourth proportional to 10,720.12, 14,786.88 and 7,731.22 is: 10,664.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,720.12 : 14,786.88 = 7,731.22 : x
  2. Step 2: Convert to fraction form
    10,720.12/14,786.88 = 7,731.22/x
  3. Step 3: Cross multiply
    10,720.12x = 14,786.88 × 7,731.22
  4. Step 4: Simplify right side
    10,720.12x = 114,320,622.39
  5. Step 5: Solve for x
    x = 114,320,622.39/10,720.12
  6. Step 6: Final answer
    x = 10,664.12

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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.