Home / 21,582.88-29,782.56-13,197.76

Finding the Fourth Proportional to 21,582.88, 29,782.56 and 13,197.76

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Solution

The fourth proportional to 21,582.88, 29,782.56 and 13,197.76 is: 18,211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,582.88 : 29,782.56 = 13,197.76 : x
  2. Step 2: Convert to fraction form
    21,582.88/29,782.56 = 13,197.76/x
  3. Step 3: Cross multiply
    21,582.88x = 29,782.56 × 13,197.76
  4. Step 4: Simplify right side
    21,582.88x = 393,063,079.07
  5. Step 5: Solve for x
    x = 393,063,079.07/21,582.88
  6. Step 6: Final answer
    x = 18,211.80

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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.