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Finding the Fourth Proportional to 12,722.32, 17,557.48 and 7,686.48

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Solution

The fourth proportional to 12,722.32, 17,557.48 and 7,686.48 is: 10,607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,722.32 : 17,557.48 = 7,686.48 : x
  2. Step 2: Convert to fraction form
    12,722.32/17,557.48 = 7,686.48/x
  3. Step 3: Cross multiply
    12,722.32x = 17,557.48 × 7,686.48
  4. Step 4: Simplify right side
    12,722.32x = 134,955,218.87
  5. Step 5: Solve for x
    x = 134,955,218.87/12,722.32
  6. Step 6: Final answer
    x = 10,607.75

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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.