Home / 15,911.01-21,970.49-13,272.26

Finding the Fourth Proportional to 15,911.01, 21,970.49 and 13,272.26

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Solution

The fourth proportional to 15,911.01, 21,970.49 and 13,272.26 is: 18,326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.01 : 21,970.49 = 13,272.26 : x
  2. Step 2: Convert to fraction form
    15,911.01/21,970.49 = 13,272.26/x
  3. Step 3: Cross multiply
    15,911.01x = 21,970.49 × 13,272.26
  4. Step 4: Simplify right side
    15,911.01x = 291,597,879.39
  5. Step 5: Solve for x
    x = 291,597,879.39/15,911.01
  6. Step 6: Final answer
    x = 18,326.80

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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.