Home / 9,109.80-12,571.58-5,130.99

Finding the Fourth Proportional to 9,109.80, 12,571.58 and 5,130.99

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Solution

The fourth proportional to 9,109.80, 12,571.58 and 5,130.99 is: 7,080.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,109.80 : 12,571.58 = 5,130.99 : x
  2. Step 2: Convert to fraction form
    9,109.80/12,571.58 = 5,130.99/x
  3. Step 3: Cross multiply
    9,109.80x = 12,571.58 × 5,130.99
  4. Step 4: Simplify right side
    9,109.80x = 64,504,625.61
  5. Step 5: Solve for x
    x = 64,504,625.61/9,109.80
  6. Step 6: Final answer
    x = 7,080.79

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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.