Home / 21,062.12-29,065.68-12,111.35

Finding the Fourth Proportional to 21,062.12, 29,065.68 and 12,111.35

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Solution

The fourth proportional to 21,062.12, 29,065.68 and 12,111.35 is: 16,713.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,062.12 : 29,065.68 = 12,111.35 : x
  2. Step 2: Convert to fraction form
    21,062.12/29,065.68 = 12,111.35/x
  3. Step 3: Cross multiply
    21,062.12x = 29,065.68 × 12,111.35
  4. Step 4: Simplify right side
    21,062.12x = 352,024,478.14
  5. Step 5: Solve for x
    x = 352,024,478.14/21,062.12
  6. Step 6: Final answer
    x = 16,713.63

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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.