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Finding the Fourth Proportional to 20,602.80, 30,830.22 and 17,838.90

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Solution

The fourth proportional to 20,602.80, 30,830.22 and 17,838.90 is: 26,694.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.80 : 30,830.22 = 17,838.90 : x
  2. Step 2: Convert to fraction form
    20,602.80/30,830.22 = 17,838.90/x
  3. Step 3: Cross multiply
    20,602.80x = 30,830.22 × 17,838.90
  4. Step 4: Simplify right side
    20,602.80x = 549,977,211.56
  5. Step 5: Solve for x
    x = 549,977,211.56/20,602.80
  6. Step 6: Final answer
    x = 26,694.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.