Home / 21,709.36-29,959.52-12,279.36

Finding the Fourth Proportional to 21,709.36, 29,959.52 and 12,279.36

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Solution

The fourth proportional to 21,709.36, 29,959.52 and 12,279.36 is: 16,945.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.36 : 29,959.52 = 12,279.36 : x
  2. Step 2: Convert to fraction form
    21,709.36/29,959.52 = 12,279.36/x
  3. Step 3: Cross multiply
    21,709.36x = 29,959.52 × 12,279.36
  4. Step 4: Simplify right side
    21,709.36x = 367,883,731.51
  5. Step 5: Solve for x
    x = 367,883,731.51/21,709.36
  6. Step 6: Final answer
    x = 16,945.86

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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.