Home / 21,132.45-29,159.73-11,700.99

Finding the Fourth Proportional to 21,132.45, 29,159.73 and 11,700.99

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Solution

The fourth proportional to 21,132.45, 29,159.73 and 11,700.99 is: 16,145.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.45 : 29,159.73 = 11,700.99 : x
  2. Step 2: Convert to fraction form
    21,132.45/29,159.73 = 11,700.99/x
  3. Step 3: Cross multiply
    21,132.45x = 29,159.73 × 11,700.99
  4. Step 4: Simplify right side
    21,132.45x = 341,197,709.13
  5. Step 5: Solve for x
    x = 341,197,709.13/21,132.45
  6. Step 6: Final answer
    x = 16,145.68

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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.