Home / 28,723.12-43,113.72-20,412.52

Finding the Fourth Proportional to 28,723.12, 43,113.72 and 20,412.52

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Solution

The fourth proportional to 28,723.12, 43,113.72 and 20,412.52 is: 30,639.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,723.12 : 43,113.72 = 20,412.52 : x
  2. Step 2: Convert to fraction form
    28,723.12/43,113.72 = 20,412.52/x
  3. Step 3: Cross multiply
    28,723.12x = 43,113.72 × 20,412.52
  4. Step 4: Simplify right side
    28,723.12x = 880,059,671.77
  5. Step 5: Solve for x
    x = 880,059,671.77/28,723.12
  6. Step 6: Final answer
    x = 30,639.42

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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.