Home / 21,359.09-29,473.36-12,408.49

Finding the Fourth Proportional to 21,359.09, 29,473.36 and 12,408.49

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Solution

The fourth proportional to 21,359.09, 29,473.36 and 12,408.49 is: 17,122.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,359.09 : 29,473.36 = 12,408.49 : x
  2. Step 2: Convert to fraction form
    21,359.09/29,473.36 = 12,408.49/x
  3. Step 3: Cross multiply
    21,359.09x = 29,473.36 × 12,408.49
  4. Step 4: Simplify right side
    21,359.09x = 365,719,892.83
  5. Step 5: Solve for x
    x = 365,719,892.83/21,359.09
  6. Step 6: Final answer
    x = 17,122.45

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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.