Home / 21,490.38-29,656.77-11,930.41

Finding the Fourth Proportional to 21,490.38, 29,656.77 and 11,930.41

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Solution

The fourth proportional to 21,490.38, 29,656.77 and 11,930.41 is: 16,463.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.38 : 29,656.77 = 11,930.41 : x
  2. Step 2: Convert to fraction form
    21,490.38/29,656.77 = 11,930.41/x
  3. Step 3: Cross multiply
    21,490.38x = 29,656.77 × 11,930.41
  4. Step 4: Simplify right side
    21,490.38x = 353,817,425.38
  5. Step 5: Solve for x
    x = 353,817,425.38/21,490.38
  6. Step 6: Final answer
    x = 16,463.99

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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.