Home / 13,429.80-20,145.12-3,570.12

Finding the Fourth Proportional to 13,429.80, 20,145.12 and 3,570.12

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Solution

The fourth proportional to 13,429.80, 20,145.12 and 3,570.12 is: 5,355.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.80 : 20,145.12 = 3,570.12 : x
  2. Step 2: Convert to fraction form
    13,429.80/20,145.12 = 3,570.12/x
  3. Step 3: Cross multiply
    13,429.80x = 20,145.12 × 3,570.12
  4. Step 4: Simplify right side
    13,429.80x = 71,920,495.81
  5. Step 5: Solve for x
    x = 71,920,495.81/13,429.80
  6. Step 6: Final answer
    x = 5,355.29

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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.