Home / 20,802.55-31,164.34-12,351.22

Finding the Fourth Proportional to 20,802.55, 31,164.34 and 12,351.22

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Solution

The fourth proportional to 20,802.55, 31,164.34 and 12,351.22 is: 18,503.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.55 : 31,164.34 = 12,351.22 : x
  2. Step 2: Convert to fraction form
    20,802.55/31,164.34 = 12,351.22/x
  3. Step 3: Cross multiply
    20,802.55x = 31,164.34 × 12,351.22
  4. Step 4: Simplify right side
    20,802.55x = 384,917,619.49
  5. Step 5: Solve for x
    x = 384,917,619.49/20,802.55
  6. Step 6: Final answer
    x = 18,503.39

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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.