Home / 42,390.36-63,584.46-20,219.40

Finding the Fourth Proportional to 42,390.36, 63,584.46 and 20,219.40

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Solution

The fourth proportional to 42,390.36, 63,584.46 and 20,219.40 is: 30,328.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,390.36 : 63,584.46 = 20,219.40 : x
  2. Step 2: Convert to fraction form
    42,390.36/63,584.46 = 20,219.40/x
  3. Step 3: Cross multiply
    42,390.36x = 63,584.46 × 20,219.40
  4. Step 4: Simplify right side
    42,390.36x = 1,285,639,630.52
  5. Step 5: Solve for x
    x = 1,285,639,630.52/42,390.36
  6. Step 6: Final answer
    x = 30,328.58

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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.