Home / 28,366.12-42,485.82-20,557

Finding the Fourth Proportional to 28,366.12, 42,485.82 and 20,557

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Solution

The fourth proportional to 28,366.12, 42,485.82 and 20,557 is: 30,789.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.12 : 42,485.82 = 20,557 : x
  2. Step 2: Convert to fraction form
    28,366.12/42,485.82 = 20,557/x
  3. Step 3: Cross multiply
    28,366.12x = 42,485.82 × 20,557
  4. Step 4: Simplify right side
    28,366.12x = 873,381,001.74
  5. Step 5: Solve for x
    x = 873,381,001.74/28,366.12
  6. Step 6: Final answer
    x = 30,789.58

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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.