Home / 12,691.08-17,500.86-9,782.37

Finding the Fourth Proportional to 12,691.08, 17,500.86 and 9,782.37

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Solution

The fourth proportional to 12,691.08, 17,500.86 and 9,782.37 is: 13,489.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,691.08 : 17,500.86 = 9,782.37 : x
  2. Step 2: Convert to fraction form
    12,691.08/17,500.86 = 9,782.37/x
  3. Step 3: Cross multiply
    12,691.08x = 17,500.86 × 9,782.37
  4. Step 4: Simplify right side
    12,691.08x = 171,199,887.84
  5. Step 5: Solve for x
    x = 171,199,887.84/12,691.08
  6. Step 6: Final answer
    x = 13,489.78

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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.