Home / 21,972.12-30,319.10-12,410.99

Finding the Fourth Proportional to 21,972.12, 30,319.10 and 12,410.99

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Solution

The fourth proportional to 21,972.12, 30,319.10 and 12,410.99 is: 17,125.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.12 : 30,319.10 = 12,410.99 : x
  2. Step 2: Convert to fraction form
    21,972.12/30,319.10 = 12,410.99/x
  3. Step 3: Cross multiply
    21,972.12x = 30,319.10 × 12,410.99
  4. Step 4: Simplify right side
    21,972.12x = 376,289,833.26
  5. Step 5: Solve for x
    x = 376,289,833.26/21,972.12
  6. Step 6: Final answer
    x = 17,125.79

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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.