Home / 21,772.59-30,045.44-12,820.62

Finding the Fourth Proportional to 21,772.59, 30,045.44 and 12,820.62

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Solution

The fourth proportional to 21,772.59, 30,045.44 and 12,820.62 is: 17,692.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,772.59 : 30,045.44 = 12,820.62 : x
  2. Step 2: Convert to fraction form
    21,772.59/30,045.44 = 12,820.62/x
  3. Step 3: Cross multiply
    21,772.59x = 30,045.44 × 12,820.62
  4. Step 4: Simplify right side
    21,772.59x = 385,201,168.97
  5. Step 5: Solve for x
    x = 385,201,168.97/21,772.59
  6. Step 6: Final answer
    x = 17,692.02

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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.