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Finding the Fourth Proportional to 20,676.60, 31,014.90 and 19,445.40

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Solution

The fourth proportional to 20,676.60, 31,014.90 and 19,445.40 is: 29,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.60 : 31,014.90 = 19,445.40 : x
  2. Step 2: Convert to fraction form
    20,676.60/31,014.90 = 19,445.40/x
  3. Step 3: Cross multiply
    20,676.60x = 31,014.90 × 19,445.40
  4. Step 4: Simplify right side
    20,676.60x = 603,097,136.46
  5. Step 5: Solve for x
    x = 603,097,136.46/20,676.60
  6. Step 6: Final answer
    x = 29,168.10

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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.