Home / 20,729.75-28,607.06-11,298.34

Finding the Fourth Proportional to 20,729.75, 28,607.06 and 11,298.34

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Solution

The fourth proportional to 20,729.75, 28,607.06 and 11,298.34 is: 15,591.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.75 : 28,607.06 = 11,298.34 : x
  2. Step 2: Convert to fraction form
    20,729.75/28,607.06 = 11,298.34/x
  3. Step 3: Cross multiply
    20,729.75x = 28,607.06 × 11,298.34
  4. Step 4: Simplify right side
    20,729.75x = 323,212,090.75
  5. Step 5: Solve for x
    x = 323,212,090.75/20,729.75
  6. Step 6: Final answer
    x = 15,591.70

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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.