Home / 28,188.29-42,285.90-9,212.47

Finding the Fourth Proportional to 28,188.29, 42,285.90 and 9,212.47

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Solution

The fourth proportional to 28,188.29, 42,285.90 and 9,212.47 is: 13,819.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.29 : 42,285.90 = 9,212.47 : x
  2. Step 2: Convert to fraction form
    28,188.29/42,285.90 = 9,212.47/x
  3. Step 3: Cross multiply
    28,188.29x = 42,285.90 × 9,212.47
  4. Step 4: Simplify right side
    28,188.29x = 389,557,462.18
  5. Step 5: Solve for x
    x = 389,557,462.18/28,188.29
  6. Step 6: Final answer
    x = 13,819.83

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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.