Home / 21,145.52-29,178.84-12,645.92

Finding the Fourth Proportional to 21,145.52, 29,178.84 and 12,645.92

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Solution

The fourth proportional to 21,145.52, 29,178.84 and 12,645.92 is: 17,450.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.52 : 29,178.84 = 12,645.92 : x
  2. Step 2: Convert to fraction form
    21,145.52/29,178.84 = 12,645.92/x
  3. Step 3: Cross multiply
    21,145.52x = 29,178.84 × 12,645.92
  4. Step 4: Simplify right side
    21,145.52x = 368,993,276.33
  5. Step 5: Solve for x
    x = 368,993,276.33/21,145.52
  6. Step 6: Final answer
    x = 17,450.19

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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.