Home / 21,159.29-29,201.65-12,209.75

Finding the Fourth Proportional to 21,159.29, 29,201.65 and 12,209.75

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Solution

The fourth proportional to 21,159.29, 29,201.65 and 12,209.75 is: 16,850.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.29 : 29,201.65 = 12,209.75 : x
  2. Step 2: Convert to fraction form
    21,159.29/29,201.65 = 12,209.75/x
  3. Step 3: Cross multiply
    21,159.29x = 29,201.65 × 12,209.75
  4. Step 4: Simplify right side
    21,159.29x = 356,544,779.06
  5. Step 5: Solve for x
    x = 356,544,779.06/21,159.29
  6. Step 6: Final answer
    x = 16,850.51

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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.