Home / 21,362.19-29,478.74-12,408.99

Finding the Fourth Proportional to 21,362.19, 29,478.74 and 12,408.99

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Solution

The fourth proportional to 21,362.19, 29,478.74 and 12,408.99 is: 17,123.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,362.19 : 29,478.74 = 12,408.99 : x
  2. Step 2: Convert to fraction form
    21,362.19/29,478.74 = 12,408.99/x
  3. Step 3: Cross multiply
    21,362.19x = 29,478.74 × 12,408.99
  4. Step 4: Simplify right side
    21,362.19x = 365,801,327.83
  5. Step 5: Solve for x
    x = 365,801,327.83/21,362.19
  6. Step 6: Final answer
    x = 17,123.77

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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.