Home / 13,020.90-19,512.45-6,439.38

Finding the Fourth Proportional to 13,020.90, 19,512.45 and 6,439.38

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Solution

The fourth proportional to 13,020.90, 19,512.45 and 6,439.38 is: 9,649.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,020.90 : 19,512.45 = 6,439.38 : x
  2. Step 2: Convert to fraction form
    13,020.90/19,512.45 = 6,439.38/x
  3. Step 3: Cross multiply
    13,020.90x = 19,512.45 × 6,439.38
  4. Step 4: Simplify right side
    13,020.90x = 125,648,080.28
  5. Step 5: Solve for x
    x = 125,648,080.28/13,020.90
  6. Step 6: Final answer
    x = 9,649.72

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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.