Home / 38,705.11-58,065.86-12,428.30

Finding the Fourth Proportional to 38,705.11, 58,065.86 and 12,428.30

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Solution

The fourth proportional to 38,705.11, 58,065.86 and 12,428.30 is: 18,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,705.11 : 58,065.86 = 12,428.30 : x
  2. Step 2: Convert to fraction form
    38,705.11/58,065.86 = 12,428.30/x
  3. Step 3: Cross multiply
    38,705.11x = 58,065.86 × 12,428.30
  4. Step 4: Simplify right side
    38,705.11x = 721,660,104.07
  5. Step 5: Solve for x
    x = 721,660,104.07/38,705.11
  6. Step 6: Final answer
    x = 18,645.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.