Home / 21,356.08-29,471.07-12,408.60

Finding the Fourth Proportional to 21,356.08, 29,471.07 and 12,408.60

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Solution

The fourth proportional to 21,356.08, 29,471.07 and 12,408.60 is: 17,123.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.08 : 29,471.07 = 12,408.60 : x
  2. Step 2: Convert to fraction form
    21,356.08/29,471.07 = 12,408.60/x
  3. Step 3: Cross multiply
    21,356.08x = 29,471.07 × 12,408.60
  4. Step 4: Simplify right side
    21,356.08x = 365,694,719.20
  5. Step 5: Solve for x
    x = 365,694,719.20/21,356.08
  6. Step 6: Final answer
    x = 17,123.68

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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.