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Finding the Fourth Proportional to 12,666.91, 18,990.11 and 5,276.92

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Solution

The fourth proportional to 12,666.91, 18,990.11 and 5,276.92 is: 7,911.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.91 : 18,990.11 = 5,276.92 : x
  2. Step 2: Convert to fraction form
    12,666.91/18,990.11 = 5,276.92/x
  3. Step 3: Cross multiply
    12,666.91x = 18,990.11 × 5,276.92
  4. Step 4: Simplify right side
    12,666.91x = 100,209,256.98
  5. Step 5: Solve for x
    x = 100,209,256.98/12,666.91
  6. Step 6: Final answer
    x = 7,911.11

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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.