Home / 21,193.68-29,260.72-13,642.80

Finding the Fourth Proportional to 21,193.68, 29,260.72 and 13,642.80

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Solution

The fourth proportional to 21,193.68, 29,260.72 and 13,642.80 is: 18,835.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,193.68 : 29,260.72 = 13,642.80 : x
  2. Step 2: Convert to fraction form
    21,193.68/29,260.72 = 13,642.80/x
  3. Step 3: Cross multiply
    21,193.68x = 29,260.72 × 13,642.80
  4. Step 4: Simplify right side
    21,193.68x = 399,198,150.82
  5. Step 5: Solve for x
    x = 399,198,150.82/21,193.68
  6. Step 6: Final answer
    x = 18,835.72

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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.