Home / 21,145.88-29,173.80-12,642.08

Finding the Fourth Proportional to 21,145.88, 29,173.80 and 12,642.08

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Solution

The fourth proportional to 21,145.88, 29,173.80 and 12,642.08 is: 17,441.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.88 : 29,173.80 = 12,642.08 : x
  2. Step 2: Convert to fraction form
    21,145.88/29,173.80 = 12,642.08/x
  3. Step 3: Cross multiply
    21,145.88x = 29,173.80 × 12,642.08
  4. Step 4: Simplify right side
    21,145.88x = 368,817,513.50
  5. Step 5: Solve for x
    x = 368,817,513.50/21,145.88
  6. Step 6: Final answer
    x = 17,441.58

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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.