Home / 13,112.80-19,669.20-5,720.80

Finding the Fourth Proportional to 13,112.80, 19,669.20 and 5,720.80

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Solution

The fourth proportional to 13,112.80, 19,669.20 and 5,720.80 is: 8,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,112.80 : 19,669.20 = 5,720.80 : x
  2. Step 2: Convert to fraction form
    13,112.80/19,669.20 = 5,720.80/x
  3. Step 3: Cross multiply
    13,112.80x = 19,669.20 × 5,720.80
  4. Step 4: Simplify right side
    13,112.80x = 112,523,559.36
  5. Step 5: Solve for x
    x = 112,523,559.36/13,112.80
  6. Step 6: Final answer
    x = 8,581.20

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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.