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Finding the Fourth Proportional to 12,763.68, 17,614.29 and 7,728.84

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Solution

The fourth proportional to 12,763.68, 17,614.29 and 7,728.84 is: 10,666.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,763.68 : 17,614.29 = 7,728.84 : x
  2. Step 2: Convert to fraction form
    12,763.68/17,614.29 = 7,728.84/x
  3. Step 3: Cross multiply
    12,763.68x = 17,614.29 × 7,728.84
  4. Step 4: Simplify right side
    12,763.68x = 136,138,029.12
  5. Step 5: Solve for x
    x = 136,138,029.12/12,763.68
  6. Step 6: Final answer
    x = 10,666.05

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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.