Home / 13,013.12-19,520.06-4,128.49

Finding the Fourth Proportional to 13,013.12, 19,520.06 and 4,128.49

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Solution

The fourth proportional to 13,013.12, 19,520.06 and 4,128.49 is: 6,192.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,013.12 : 19,520.06 = 4,128.49 : x
  2. Step 2: Convert to fraction form
    13,013.12/19,520.06 = 4,128.49/x
  3. Step 3: Cross multiply
    13,013.12x = 19,520.06 × 4,128.49
  4. Step 4: Simplify right side
    13,013.12x = 80,588,466.00
  5. Step 5: Solve for x
    x = 80,588,466.00/13,013.12
  6. Step 6: Final answer
    x = 6,192.86

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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.