Home / 21,663.41-29,879.51-13,697.91

Finding the Fourth Proportional to 21,663.41, 29,879.51 and 13,697.91

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Solution

The fourth proportional to 21,663.41, 29,879.51 and 13,697.91 is: 18,893.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,663.41 : 29,879.51 = 13,697.91 : x
  2. Step 2: Convert to fraction form
    21,663.41/29,879.51 = 13,697.91/x
  3. Step 3: Cross multiply
    21,663.41x = 29,879.51 × 13,697.91
  4. Step 4: Simplify right side
    21,663.41x = 409,286,770.33
  5. Step 5: Solve for x
    x = 409,286,770.33/21,663.41
  6. Step 6: Final answer
    x = 18,893.00

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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.