Home / 21,102.73-29,125.36-12,155.42

Finding the Fourth Proportional to 21,102.73, 29,125.36 and 12,155.42

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Solution

The fourth proportional to 21,102.73, 29,125.36 and 12,155.42 is: 16,776.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.73 : 29,125.36 = 12,155.42 : x
  2. Step 2: Convert to fraction form
    21,102.73/29,125.36 = 12,155.42/x
  3. Step 3: Cross multiply
    21,102.73x = 29,125.36 × 12,155.42
  4. Step 4: Simplify right side
    21,102.73x = 354,030,922.67
  5. Step 5: Solve for x
    x = 354,030,922.67/21,102.73
  6. Step 6: Final answer
    x = 16,776.55

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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.