Home / 20,729.71-28,607.01-11,777.23

Finding the Fourth Proportional to 20,729.71, 28,607.01 and 11,777.23

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Solution

The fourth proportional to 20,729.71, 28,607.01 and 11,777.23 is: 16,252.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.71 : 28,607.01 = 11,777.23 : x
  2. Step 2: Convert to fraction form
    20,729.71/28,607.01 = 11,777.23/x
  3. Step 3: Cross multiply
    20,729.71x = 28,607.01 × 11,777.23
  4. Step 4: Simplify right side
    20,729.71x = 336,911,427.35
  5. Step 5: Solve for x
    x = 336,911,427.35/20,729.71
  6. Step 6: Final answer
    x = 16,252.58

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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.