Home / 20,125.67-27,772.18-11,172.64

Finding the Fourth Proportional to 20,125.67, 27,772.18 and 11,172.64

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Solution

The fourth proportional to 20,125.67, 27,772.18 and 11,172.64 is: 15,417.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.67 : 27,772.18 = 11,172.64 : x
  2. Step 2: Convert to fraction form
    20,125.67/27,772.18 = 11,172.64/x
  3. Step 3: Cross multiply
    20,125.67x = 27,772.18 × 11,172.64
  4. Step 4: Simplify right side
    20,125.67x = 310,288,569.16
  5. Step 5: Solve for x
    x = 310,288,569.16/20,125.67
  6. Step 6: Final answer
    x = 15,417.55

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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.