Home / 13,105.20-19,656.90-4,220.40

Finding the Fourth Proportional to 13,105.20, 19,656.90 and 4,220.40

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Solution

The fourth proportional to 13,105.20, 19,656.90 and 4,220.40 is: 6,330.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.20 : 19,656.90 = 4,220.40 : x
  2. Step 2: Convert to fraction form
    13,105.20/19,656.90 = 4,220.40/x
  3. Step 3: Cross multiply
    13,105.20x = 19,656.90 × 4,220.40
  4. Step 4: Simplify right side
    13,105.20x = 82,959,980.76
  5. Step 5: Solve for x
    x = 82,959,980.76/13,105.20
  6. Step 6: Final answer
    x = 6,330.31

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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.