Home / 13,429.10-20,143.65-12,860.30

Finding the Fourth Proportional to 13,429.10, 20,143.65 and 12,860.30

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Solution

The fourth proportional to 13,429.10, 20,143.65 and 12,860.30 is: 19,290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.10 : 20,143.65 = 12,860.30 : x
  2. Step 2: Convert to fraction form
    13,429.10/20,143.65 = 12,860.30/x
  3. Step 3: Cross multiply
    13,429.10x = 20,143.65 × 12,860.30
  4. Step 4: Simplify right side
    13,429.10x = 259,053,382.10
  5. Step 5: Solve for x
    x = 259,053,382.10/13,429.10
  6. Step 6: Final answer
    x = 19,290.45

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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.