Home / 13,128.39-19,685.30-4,358.52

Finding the Fourth Proportional to 13,128.39, 19,685.30 and 4,358.52

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Solution

The fourth proportional to 13,128.39, 19,685.30 and 4,358.52 is: 6,535.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.39 : 19,685.30 = 4,358.52 : x
  2. Step 2: Convert to fraction form
    13,128.39/19,685.30 = 4,358.52/x
  3. Step 3: Cross multiply
    13,128.39x = 19,685.30 × 4,358.52
  4. Step 4: Simplify right side
    13,128.39x = 85,798,751.96
  5. Step 5: Solve for x
    x = 85,798,751.96/13,128.39
  6. Step 6: Final answer
    x = 6,535.36

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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.