Home / 21,202.55-29,261.84-12,128.76

Finding the Fourth Proportional to 21,202.55, 29,261.84 and 12,128.76

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Solution

The fourth proportional to 21,202.55, 29,261.84 and 12,128.76 is: 16,739.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,202.55 : 29,261.84 = 12,128.76 : x
  2. Step 2: Convert to fraction form
    21,202.55/29,261.84 = 12,128.76/x
  3. Step 3: Cross multiply
    21,202.55x = 29,261.84 × 12,128.76
  4. Step 4: Simplify right side
    21,202.55x = 354,909,834.52
  5. Step 5: Solve for x
    x = 354,909,834.52/21,202.55
  6. Step 6: Final answer
    x = 16,739.02

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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.