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Finding the Fourth Proportional to 19,777.60, 29,666.40 and 18,902.80

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Solution

The fourth proportional to 19,777.60, 29,666.40 and 18,902.80 is: 28,354.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,777.60 : 29,666.40 = 18,902.80 : x
  2. Step 2: Convert to fraction form
    19,777.60/29,666.40 = 18,902.80/x
  3. Step 3: Cross multiply
    19,777.60x = 29,666.40 × 18,902.80
  4. Step 4: Simplify right side
    19,777.60x = 560,778,025.92
  5. Step 5: Solve for x
    x = 560,778,025.92/19,777.60
  6. Step 6: Final answer
    x = 28,354.20

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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.