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Finding the Fourth Proportional to 21,310.99, 29,410.77 and 12,358.42

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Solution

The fourth proportional to 21,310.99, 29,410.77 and 12,358.42 is: 17,055.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.99 : 29,410.77 = 12,358.42 : x
  2. Step 2: Convert to fraction form
    21,310.99/29,410.77 = 12,358.42/x
  3. Step 3: Cross multiply
    21,310.99x = 29,410.77 × 12,358.42
  4. Step 4: Simplify right side
    21,310.99x = 363,470,574.66
  5. Step 5: Solve for x
    x = 363,470,574.66/21,310.99
  6. Step 6: Final answer
    x = 17,055.54

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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.