Home / 28,439.40-42,597.54-20,631

Finding the Fourth Proportional to 28,439.40, 42,597.54 and 20,631

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Solution

The fourth proportional to 28,439.40, 42,597.54 and 20,631 is: 30,901.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.40 : 42,597.54 = 20,631 : x
  2. Step 2: Convert to fraction form
    28,439.40/42,597.54 = 20,631/x
  3. Step 3: Cross multiply
    28,439.40x = 42,597.54 × 20,631
  4. Step 4: Simplify right side
    28,439.40x = 878,829,847.74
  5. Step 5: Solve for x
    x = 878,829,847.74/28,439.40
  6. Step 6: Final answer
    x = 30,901.84

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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.