Home / 20,130.05-27,775.32-12,172.70

Finding the Fourth Proportional to 20,130.05, 27,775.32 and 12,172.70

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Solution

The fourth proportional to 20,130.05, 27,775.32 and 12,172.70 is: 16,795.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.05 : 27,775.32 = 12,172.70 : x
  2. Step 2: Convert to fraction form
    20,130.05/27,775.32 = 12,172.70/x
  3. Step 3: Cross multiply
    20,130.05x = 27,775.32 × 12,172.70
  4. Step 4: Simplify right side
    20,130.05x = 338,100,637.76
  5. Step 5: Solve for x
    x = 338,100,637.76/20,130.05
  6. Step 6: Final answer
    x = 16,795.82

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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.