Home / 21,715.99-29,969.52-12,156.73

Finding the Fourth Proportional to 21,715.99, 29,969.52 and 12,156.73

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Solution

The fourth proportional to 21,715.99, 29,969.52 and 12,156.73 is: 16,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.99 : 29,969.52 = 12,156.73 : x
  2. Step 2: Convert to fraction form
    21,715.99/29,969.52 = 12,156.73/x
  3. Step 3: Cross multiply
    21,715.99x = 29,969.52 × 12,156.73
  4. Step 4: Simplify right side
    21,715.99x = 364,331,287.95
  5. Step 5: Solve for x
    x = 364,331,287.95/21,715.99
  6. Step 6: Final answer
    x = 16,777.10

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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.