Home / 42,619.20-63,880.80-20,443.20

Finding the Fourth Proportional to 42,619.20, 63,880.80 and 20,443.20

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Solution

The fourth proportional to 42,619.20, 63,880.80 and 20,443.20 is: 30,641.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,619.20 : 63,880.80 = 20,443.20 : x
  2. Step 2: Convert to fraction form
    42,619.20/63,880.80 = 20,443.20/x
  3. Step 3: Cross multiply
    42,619.20x = 63,880.80 × 20,443.20
  4. Step 4: Simplify right side
    42,619.20x = 1,305,927,970.56
  5. Step 5: Solve for x
    x = 1,305,927,970.56/42,619.20
  6. Step 6: Final answer
    x = 30,641.78

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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.