Home / 21,030.12-29,021.36-12,080.43

Finding the Fourth Proportional to 21,030.12, 29,021.36 and 12,080.43

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Solution

The fourth proportional to 21,030.12, 29,021.36 and 12,080.43 is: 16,670.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.12 : 29,021.36 = 12,080.43 : x
  2. Step 2: Convert to fraction form
    21,030.12/29,021.36 = 12,080.43/x
  3. Step 3: Cross multiply
    21,030.12x = 29,021.36 × 12,080.43
  4. Step 4: Simplify right side
    21,030.12x = 350,590,447.58
  5. Step 5: Solve for x
    x = 350,590,447.58/21,030.12
  6. Step 6: Final answer
    x = 16,670.87

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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.