Home / 21,057.40-29,060.58-12,107.80

Finding the Fourth Proportional to 21,057.40, 29,060.58 and 12,107.80

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Solution

The fourth proportional to 21,057.40, 29,060.58 and 12,107.80 is: 16,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.40 : 29,060.58 = 12,107.80 : x
  2. Step 2: Convert to fraction form
    21,057.40/29,060.58 = 12,107.80/x
  3. Step 3: Cross multiply
    21,057.40x = 29,060.58 × 12,107.80
  4. Step 4: Simplify right side
    21,057.40x = 351,859,690.52
  5. Step 5: Solve for x
    x = 351,859,690.52/21,057.40
  6. Step 6: Final answer
    x = 16,709.55

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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.