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Finding the Fourth Proportional to 15,909.60, 23,815.80 and 12,410.40

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Solution

The fourth proportional to 15,909.60, 23,815.80 and 12,410.40 is: 18,577.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.60 : 23,815.80 = 12,410.40 : x
  2. Step 2: Convert to fraction form
    15,909.60/23,815.80 = 12,410.40/x
  3. Step 3: Cross multiply
    15,909.60x = 23,815.80 × 12,410.40
  4. Step 4: Simplify right side
    15,909.60x = 295,563,604.32
  5. Step 5: Solve for x
    x = 295,563,604.32/15,909.60
  6. Step 6: Final answer
    x = 18,577.69

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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.