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Finding the Fourth Proportional to 20,980.99, 31,462.24 and 11,117.99

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Solution

The fourth proportional to 20,980.99, 31,462.24 and 11,117.99 is: 16,672.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.99 : 31,462.24 = 11,117.99 : x
  2. Step 2: Convert to fraction form
    20,980.99/31,462.24 = 11,117.99/x
  3. Step 3: Cross multiply
    20,980.99x = 31,462.24 × 11,117.99
  4. Step 4: Simplify right side
    20,980.99x = 349,796,869.70
  5. Step 5: Solve for x
    x = 349,796,869.70/20,980.99
  6. Step 6: Final answer
    x = 16,672.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.