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Finding the Fourth Proportional to 12,653.60, 18,941.88 and 9,515.12

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Solution

The fourth proportional to 12,653.60, 18,941.88 and 9,515.12 is: 14,243.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.60 : 18,941.88 = 9,515.12 : x
  2. Step 2: Convert to fraction form
    12,653.60/18,941.88 = 9,515.12/x
  3. Step 3: Cross multiply
    12,653.60x = 18,941.88 × 9,515.12
  4. Step 4: Simplify right side
    12,653.60x = 180,234,261.23
  5. Step 5: Solve for x
    x = 180,234,261.23/12,653.60
  6. Step 6: Final answer
    x = 14,243.71

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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.