Home / 18,220.96-25,140.44-12,159.28

Finding the Fourth Proportional to 18,220.96, 25,140.44 and 12,159.28

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Solution

The fourth proportional to 18,220.96, 25,140.44 and 12,159.28 is: 16,776.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.96 : 25,140.44 = 12,159.28 : x
  2. Step 2: Convert to fraction form
    18,220.96/25,140.44 = 12,159.28/x
  3. Step 3: Cross multiply
    18,220.96x = 25,140.44 × 12,159.28
  4. Step 4: Simplify right side
    18,220.96x = 305,689,649.28
  5. Step 5: Solve for x
    x = 305,689,649.28/18,220.96
  6. Step 6: Final answer
    x = 16,776.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.