Home / 13,120.09-19,681.19-4,113.58

Finding the Fourth Proportional to 13,120.09, 19,681.19 and 4,113.58

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Solution

The fourth proportional to 13,120.09, 19,681.19 and 4,113.58 is: 6,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.09 : 19,681.19 = 4,113.58 : x
  2. Step 2: Convert to fraction form
    13,120.09/19,681.19 = 4,113.58/x
  3. Step 3: Cross multiply
    13,120.09x = 19,681.19 × 4,113.58
  4. Step 4: Simplify right side
    13,120.09x = 80,960,149.56
  5. Step 5: Solve for x
    x = 80,960,149.56/13,120.09
  6. Step 6: Final answer
    x = 6,170.70

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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.