Home / 21,410.64-29,539.47-12,450.78

Finding the Fourth Proportional to 21,410.64, 29,539.47 and 12,450.78

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Solution

The fourth proportional to 21,410.64, 29,539.47 and 12,450.78 is: 17,177.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,410.64 : 29,539.47 = 12,450.78 : x
  2. Step 2: Convert to fraction form
    21,410.64/29,539.47 = 12,450.78/x
  3. Step 3: Cross multiply
    21,410.64x = 29,539.47 × 12,450.78
  4. Step 4: Simplify right side
    21,410.64x = 367,789,442.29
  5. Step 5: Solve for x
    x = 367,789,442.29/21,410.64
  6. Step 6: Final answer
    x = 17,177.88

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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.