Home / 21,725.58-29,985.98-13,230.51

Finding the Fourth Proportional to 21,725.58, 29,985.98 and 13,230.51

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Solution

The fourth proportional to 21,725.58, 29,985.98 and 13,230.51 is: 18,260.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,725.58 : 29,985.98 = 13,230.51 : x
  2. Step 2: Convert to fraction form
    21,725.58/29,985.98 = 13,230.51/x
  3. Step 3: Cross multiply
    21,725.58x = 29,985.98 × 13,230.51
  4. Step 4: Simplify right side
    21,725.58x = 396,729,808.25
  5. Step 5: Solve for x
    x = 396,729,808.25/21,725.58
  6. Step 6: Final answer
    x = 18,260.95

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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.