Home / 21,406.87-29,551.40-12,451.11

Finding the Fourth Proportional to 21,406.87, 29,551.40 and 12,451.11

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Solution

The fourth proportional to 21,406.87, 29,551.40 and 12,451.11 is: 17,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,406.87 : 29,551.40 = 12,451.11 : x
  2. Step 2: Convert to fraction form
    21,406.87/29,551.40 = 12,451.11/x
  3. Step 3: Cross multiply
    21,406.87x = 29,551.40 × 12,451.11
  4. Step 4: Simplify right side
    21,406.87x = 367,947,732.05
  5. Step 5: Solve for x
    x = 367,947,732.05/21,406.87
  6. Step 6: Final answer
    x = 17,188.30

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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.