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Finding the Fourth Proportional to 15,241.60, 21,028.80 and 8,950.40

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Solution

The fourth proportional to 15,241.60, 21,028.80 and 8,950.40 is: 12,348.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,241.60 : 21,028.80 = 8,950.40 : x
  2. Step 2: Convert to fraction form
    15,241.60/21,028.80 = 8,950.40/x
  3. Step 3: Cross multiply
    15,241.60x = 21,028.80 × 8,950.40
  4. Step 4: Simplify right side
    15,241.60x = 188,216,171.52
  5. Step 5: Solve for x
    x = 188,216,171.52/15,241.60
  6. Step 6: Final answer
    x = 12,348.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.