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Finding the Fourth Proportional to 12,651.60, 18,938.88 and 9,513.12

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Solution

The fourth proportional to 12,651.60, 18,938.88 and 9,513.12 is: 14,240.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651.60 : 18,938.88 = 9,513.12 : x
  2. Step 2: Convert to fraction form
    12,651.60/18,938.88 = 9,513.12/x
  3. Step 3: Cross multiply
    12,651.60x = 18,938.88 × 9,513.12
  4. Step 4: Simplify right side
    12,651.60x = 180,167,838.11
  5. Step 5: Solve for x
    x = 180,167,838.11/12,651.60
  6. Step 6: Final answer
    x = 14,240.72

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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.