Home / 20,220.36-30,312.06-17,120.34

Finding the Fourth Proportional to 20,220.36, 30,312.06 and 17,120.34

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Solution

The fourth proportional to 20,220.36, 30,312.06 and 17,120.34 is: 25,664.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.36 : 30,312.06 = 17,120.34 : x
  2. Step 2: Convert to fraction form
    20,220.36/30,312.06 = 17,120.34/x
  3. Step 3: Cross multiply
    20,220.36x = 30,312.06 × 17,120.34
  4. Step 4: Simplify right side
    20,220.36x = 518,952,773.30
  5. Step 5: Solve for x
    x = 518,952,773.30/20,220.36
  6. Step 6: Final answer
    x = 25,664.86

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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.