Home / 21,108.23-29,116.67-13,938.21

Finding the Fourth Proportional to 21,108.23, 29,116.67 and 13,938.21

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Solution

The fourth proportional to 21,108.23, 29,116.67 and 13,938.21 is: 19,226.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.23 : 29,116.67 = 13,938.21 : x
  2. Step 2: Convert to fraction form
    21,108.23/29,116.67 = 13,938.21/x
  3. Step 3: Cross multiply
    21,108.23x = 29,116.67 × 13,938.21
  4. Step 4: Simplify right side
    21,108.23x = 405,834,191.27
  5. Step 5: Solve for x
    x = 405,834,191.27/21,108.23
  6. Step 6: Final answer
    x = 19,226.35

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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.