Home / 21,108.48-29,117.01-13,938.46

Finding the Fourth Proportional to 21,108.48, 29,117.01 and 13,938.46

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Solution

The fourth proportional to 21,108.48, 29,117.01 and 13,938.46 is: 19,226.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.48 : 29,117.01 = 13,938.46 : x
  2. Step 2: Convert to fraction form
    21,108.48/29,117.01 = 13,938.46/x
  3. Step 3: Cross multiply
    21,108.48x = 29,117.01 × 13,938.46
  4. Step 4: Simplify right side
    21,108.48x = 405,846,279.20
  5. Step 5: Solve for x
    x = 405,846,279.20/21,108.48
  6. Step 6: Final answer
    x = 19,226.69

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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.