Home / 21,102.12-29,124.45-12,147.93

Finding the Fourth Proportional to 21,102.12, 29,124.45 and 12,147.93

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Solution

The fourth proportional to 21,102.12, 29,124.45 and 12,147.93 is: 16,766.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.12 : 29,124.45 = 12,147.93 : x
  2. Step 2: Convert to fraction form
    21,102.12/29,124.45 = 12,147.93/x
  3. Step 3: Cross multiply
    21,102.12x = 29,124.45 × 12,147.93
  4. Step 4: Simplify right side
    21,102.12x = 353,801,779.89
  5. Step 5: Solve for x
    x = 353,801,779.89/21,102.12
  6. Step 6: Final answer
    x = 16,766.17

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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.