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Finding the Fourth Proportional to 19,903.60, 29,855.40 and 16,620.40

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Solution

The fourth proportional to 19,903.60, 29,855.40 and 16,620.40 is: 24,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,903.60 : 29,855.40 = 16,620.40 : x
  2. Step 2: Convert to fraction form
    19,903.60/29,855.40 = 16,620.40/x
  3. Step 3: Cross multiply
    19,903.60x = 29,855.40 × 16,620.40
  4. Step 4: Simplify right side
    19,903.60x = 496,208,690.16
  5. Step 5: Solve for x
    x = 496,208,690.16/19,903.60
  6. Step 6: Final answer
    x = 24,930.60

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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.