Home / 21,328.70-29,434.50-11,897.25

Finding the Fourth Proportional to 21,328.70, 29,434.50 and 11,897.25

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Solution

The fourth proportional to 21,328.70, 29,434.50 and 11,897.25 is: 16,418.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.70 : 29,434.50 = 11,897.25 : x
  2. Step 2: Convert to fraction form
    21,328.70/29,434.50 = 11,897.25/x
  3. Step 3: Cross multiply
    21,328.70x = 29,434.50 × 11,897.25
  4. Step 4: Simplify right side
    21,328.70x = 350,189,605.13
  5. Step 5: Solve for x
    x = 350,189,605.13/21,328.70
  6. Step 6: Final answer
    x = 16,418.71

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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.