Home / 15,661.36-21,595.80-11,891.44

Finding the Fourth Proportional to 15,661.36, 21,595.80 and 11,891.44

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Solution

The fourth proportional to 15,661.36, 21,595.80 and 11,891.44 is: 16,397.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.36 : 21,595.80 = 11,891.44 : x
  2. Step 2: Convert to fraction form
    15,661.36/21,595.80 = 11,891.44/x
  3. Step 3: Cross multiply
    15,661.36x = 21,595.80 × 11,891.44
  4. Step 4: Simplify right side
    15,661.36x = 256,805,159.95
  5. Step 5: Solve for x
    x = 256,805,159.95/15,661.36
  6. Step 6: Final answer
    x = 16,397.37

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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.