Home / 20,611.67-28,444.16-11,180.30

Finding the Fourth Proportional to 20,611.67, 28,444.16 and 11,180.30

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Solution

The fourth proportional to 20,611.67, 28,444.16 and 11,180.30 is: 15,428.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.67 : 28,444.16 = 11,180.30 : x
  2. Step 2: Convert to fraction form
    20,611.67/28,444.16 = 11,180.30/x
  3. Step 3: Cross multiply
    20,611.67x = 28,444.16 × 11,180.30
  4. Step 4: Simplify right side
    20,611.67x = 318,014,127.78
  5. Step 5: Solve for x
    x = 318,014,127.78/20,611.67
  6. Step 6: Final answer
    x = 15,428.84

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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.