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Finding the Fourth Proportional to 15,904.80, 23,857.20 and 8,906.40

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Solution

The fourth proportional to 15,904.80, 23,857.20 and 8,906.40 is: 13,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,904.80 : 23,857.20 = 8,906.40 : x
  2. Step 2: Convert to fraction form
    15,904.80/23,857.20 = 8,906.40/x
  3. Step 3: Cross multiply
    15,904.80x = 23,857.20 × 8,906.40
  4. Step 4: Simplify right side
    15,904.80x = 212,481,766.08
  5. Step 5: Solve for x
    x = 212,481,766.08/15,904.80
  6. Step 6: Final answer
    x = 13,359.60

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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.