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Finding the Fourth Proportional to 12,650.61, 18,980.10 and 7,965.12

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Solution

The fourth proportional to 12,650.61, 18,980.10 and 7,965.12 is: 11,950.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,650.61 : 18,980.10 = 7,965.12 : x
  2. Step 2: Convert to fraction form
    12,650.61/18,980.10 = 7,965.12/x
  3. Step 3: Cross multiply
    12,650.61x = 18,980.10 × 7,965.12
  4. Step 4: Simplify right side
    12,650.61x = 151,178,774.11
  5. Step 5: Solve for x
    x = 151,178,774.11/12,650.61
  6. Step 6: Final answer
    x = 11,950.31

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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.