Home / 21,309.11-29,402.70-12,355.37

Finding the Fourth Proportional to 21,309.11, 29,402.70 and 12,355.37

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Solution

The fourth proportional to 21,309.11, 29,402.70 and 12,355.37 is: 17,048.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.11 : 29,402.70 = 12,355.37 : x
  2. Step 2: Convert to fraction form
    21,309.11/29,402.70 = 12,355.37/x
  3. Step 3: Cross multiply
    21,309.11x = 29,402.70 × 12,355.37
  4. Step 4: Simplify right side
    21,309.11x = 363,281,154.41
  5. Step 5: Solve for x
    x = 363,281,154.41/21,309.11
  6. Step 6: Final answer
    x = 17,048.16

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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.