Home / 21,518.99-29,695.41-11,959.47

Finding the Fourth Proportional to 21,518.99, 29,695.41 and 11,959.47

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Solution

The fourth proportional to 21,518.99, 29,695.41 and 11,959.47 is: 16,503.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.99 : 29,695.41 = 11,959.47 : x
  2. Step 2: Convert to fraction form
    21,518.99/29,695.41 = 11,959.47/x
  3. Step 3: Cross multiply
    21,518.99x = 29,695.41 × 11,959.47
  4. Step 4: Simplify right side
    21,518.99x = 355,141,365.03
  5. Step 5: Solve for x
    x = 355,141,365.03/21,518.99
  6. Step 6: Final answer
    x = 16,503.63

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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.