Home / 21,150.68-29,185.90-12,651.08

Finding the Fourth Proportional to 21,150.68, 29,185.90 and 12,651.08

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Solution

The fourth proportional to 21,150.68, 29,185.90 and 12,651.08 is: 17,457.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,150.68 : 29,185.90 = 12,651.08 : x
  2. Step 2: Convert to fraction form
    21,150.68/29,185.90 = 12,651.08/x
  3. Step 3: Cross multiply
    21,150.68x = 29,185.90 × 12,651.08
  4. Step 4: Simplify right side
    21,150.68x = 369,232,978.21
  5. Step 5: Solve for x
    x = 369,232,978.21/21,150.68
  6. Step 6: Final answer
    x = 17,457.27

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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.